CN116427511A - Water safety type sponge urban rainwater treatment and reutilization method - Google Patents
Water safety type sponge urban rainwater treatment and reutilization method Download PDFInfo
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Abstract
The invention provides a water-safe sponge urban rainwater treatment and reuse method, which comprises the following steps: collecting rain sewage on the ground and a rain pipe network; determining a treatment mode of the rain water according to the current weather information and the weather forecast information; according to the treatment mode, conveying the rain sewage to a purification unit for purification in a corresponding mode and storing after purification; and when the output conditions under the corresponding processing modes are met, conveying the stored purified water to the corresponding application scene. Based on the technical scheme of the invention, the corresponding rainwater treatment mode is selected pertinently, the purpose of timely absorbing the rainwater runoff of the low-lying water accumulation points and achieving local water accumulation and waterlogging prevention is achieved, meanwhile, the rainwater accumulated in summer is transferred to dry seasons for use by utilizing the long-term water accumulation mode, so that the space-time conversion of rainwater resources is realized, and the drought and drought resistance of the city is improved.
Description
Technical Field
The invention relates to the technical field of rain water prevention, pollution control and rainwater recycling of sponge urban rainfall, in particular to a water safety type sponge urban rainwater treatment and recycling method.
Background
The urban water safety problem is a major problem of ecological civilization construction, is also a main problem that sponge urban construction needs to be broken, and is mainly expressed as three major urban diseases of heavy rain and waterlogging, drought and water shortage and water pollution. The flood disaster is a key problem of water safety, and particularly the water conditions of the vast northern cities in the north of the Huaihe river are characterized in that: rain and heat are distributed unevenly in the same season and in space and time, waterlogging and drought are alternately presented, drought and waterlogging are synchronously symbiotic with pollution, waterlogging is in the countryside, and dry land is dust-collecting and sewage is turbid.
At present, the constructed sponge city achieves a certain effect in the aspects of reducing urban waterlogging, ecologically regulating and controlling and the like, and plays a good role. However, due to the restrictions of investment, technology and other factors, the functions of water storage, peak regulation, purification and recycling of the conventional sponge city are imperfect, particularly under the high-intensity precipitation background exceeding the waterlogging prevention and control standard, the seepage function is invalid due to soil saturation, the drainage function is limited due to full flow of a pipe network, the pollution reduction function is reduced due to facility attenuation, and the sponge city is invalid.
Therefore, the urban comprehensive water control core with waterlogging prevention and disaster reduction is required to be provided, the water safety type sponge city concept is established, a more perfect water safety type sponge city rainwater treatment and recycling method is established, and the rainwater is recycled after being purified while the urban waterlogging is solved.
Disclosure of Invention
In order to solve the problems of imperfect rainwater treatment and waterlogging prevention functions of the existing sponge city, the application provides a water-safety type sponge city rainwater treatment and recycling method.
The invention provides a water-safe sponge urban rainwater treatment and reuse method, which comprises the following steps:
collecting rain sewage on the ground and a rain pipe network;
determining a treatment mode of the rain water according to the current weather information and the weather forecast information;
according to the treatment mode, conveying the rain sewage to a purification unit for purification in a corresponding mode and storing after purification;
and when the output conditions under the corresponding processing modes are met, conveying the stored purified water to the corresponding application scene.
In one embodiment, the current weather information and weather forecast information includes whether or not to rainfall and a rainfall amount.
In one embodiment, determining the treatment mode of the rain water according to the current weather information and the weather forecast information includes:
determining whether rainfall exists and the scale of the rainfall in a certain time range in the future according to the current weather information and the weather forecast information;
if rainfall exists in a certain time range in the future and the scale exceeds a first preset standard, determining that the rain sewage treatment mode is a temporary storage mode;
and if no rainfall exists or the rainfall exists within a certain time range in the future but the scale does not exceed a first preset standard, determining that the treatment mode of the rain sewage is a long-term water storage mode.
In one embodiment, according to the treatment mode, the step of conveying the rain water to a purification unit for purification in a corresponding mode and storage after purification comprises the steps of:
for the temporary storage mode, after sequentially passing through the pretreatment module and the microporous filtration module of the purification unit, the rainwater and the sewage pass through the natural purification module in a way of no stay or stay time less than a preset time length and then enter the water storage unit for temporary storage;
for the long-term water storage mode, the rain sewage enters the natural purification module after sequentially passing through the pretreatment module and the microporous filtration module of the purification unit, and enters the water storage unit for long-term storage after staying and standing for a preset time.
In one embodiment, the method further comprises:
for the long-term water storage mode, the rain sewage enters a natural purification module and enters a water storage unit for long-term storage after standing still for a preset time period and/or reaching the urban sewage recycling standard.
In one embodiment, the output conditions include:
for the processing mode being a temporary storage mode, the output condition comprises that the next rainfall comes before;
for the treatment mode being a long term water storage mode, the output conditions include dry season water.
In one embodiment, the method for delivering the stored purified water to the corresponding application scenario further comprises:
for the temporary storage mode, determining the transportation mode of the stored purified water according to the scale of the next rainfall;
if the scale of the next rainfall exceeds a second preset standard, determining that the conveying mode is an emptying mode, and outputting all the current stored purified water;
and if the rainfall scale of the next rainfall does not exceed the second preset standard, determining that the conveying mode is a quantitative mode, and outputting a certain amount of purified water according to the stored quantity of the purified water stored currently so as to vacate a storage space for absorbing the rainfall of the next rainfall.
In one embodiment, the application scenario includes:
for the processing mode being a temporary storage mode, the application scene comprises water bodies such as rivers, lakes and the like;
for the treatment mode, a long-term water storage mode is adopted, and the application scene comprises urban miscellaneous water, urban landscape environment water, a water seepage well for recharging stratum, and water bodies such as a back-filled river, a lake, a reservoir and the like.
In one embodiment, the method further comprises:
acquiring the total operation time of the microporous filter module in the purification unit after the previous cleaning;
and when the total operation time length meets the preset time length, back flushing and cleaning the microporous filter module by utilizing the stored purified water.
In one embodiment, the method further comprises:
judging the pollution degree of the rain sewage;
and conveying the rain sewage to a corresponding purification module in the purification unit according to the pollution degree.
The above-described features may be combined in various suitable ways or replaced by equivalent features as long as the object of the present invention can be achieved.
Compared with the prior art, the water safety type sponge urban rainwater treatment and recycling method provided by the invention has at least the following beneficial effects:
according to the water safety type sponge urban rainwater treatment and recycling method, the current and future rainfall conditions are judged based on weather information, and corresponding rainwater treatment modes are selected in a targeted mode. The temporary storage mode is based on intermittent collection and emptying of rainwater, so that rapid digestion of the rainwater runoff can be realized, the rainwater runoff of the low-lying water accumulation point can be timely absorbed, the purpose of local water accumulation and waterlogging prevention is realized, and the flood prevention safety is ensured; the long-term water storage mode can enable the effluent to reach the relevant recycling standard of urban reclaimed water after long-term purification, and then the rainwater stored in summer is transferred to dry seasons for use, so that space-time conversion of rainwater resources is realized, drought-resistant and drought-resistant capability of the city is improved, and the problem of drought and water shortage in winter and spring of northern cities is solved.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
fig. 1 shows a main flow diagram of the method of the invention.
Detailed Description
At present, urban waterlogging is apparent to be a problem of 'ponding points', but is a systematic problem of urban construction in nature; by adopting the pipe drainage measure only, only one row is needed, and the aim of comprehensive control is difficult to achieve. The urban water problem is treated in isolation in the prior art, and the symptoms and the root causes are not treated.
The aim of the application is to solve three problems of water source safety, water quality safety and drainage safety of northern cities especially on the basis of solving urban waterlogging. The urban rainfall waterlogging prevention and treatment method is summarized on the basis of water collection structures such as permeable pavement, water guide path kerb, ventilation impermeable sand (blanket), silica sand honeycomb structures and the like, and urban idle underground spaces (greenbelts, parks, roads, parking lots, landscape water bodies and the like) are combined, a comprehensive water control system is constructed through multiple points and distribution, a starboard chess cloth underground bionic pond is formed, the functions of water storage, flood stagnation, purification and the like of the original natural water system of the urban area are locally restored, water damage is converted into water conservancy, and the urban rainfall waterlogging prevention and treatment method is adopted.
The invention will be further illustrated with reference to the following examples.
Example 1
The present embodiment mainly illustrates the operation principle of the waterlogging prevention method of the present invention when the processing mode is the temporary storage mode.
The invention provides a water-safe sponge urban rainwater treatment and reuse method, which comprises the following steps:
step S10: collecting rain sewage on the ground and a rain pipe network;
specifically, through step S10, the rainwater is collected and digested, and the problem of urban inland inundation is solved first. The collection of rain sewage mainly passes through municipal pipe network and some infiltration facilities based on sponge city construction, for example urban road surface and afforestation view's infiltration facility.
Step S20: determining a treatment mode of the rain sewage according to current weather information and weather forecast information, wherein the current weather information and the weather forecast information comprise whether rainfall and rainfall;
step S21: determining whether rainfall exists and the scale of the rainfall in a certain time range in the future according to the current weather information and the weather forecast information;
step S22: determining that rainfall exists in a certain time range in the future and the scale exceeds a first preset standard, and determining that a treatment mode of the rain sewage is a temporary storage mode;
specifically, according to the current weather information and the weather forecast information, the rainfall condition in a future period of time after the current moment can be determined, and the current rain sewage treatment mode is determined according to the rainfall condition in the future period of time.
If there is rainfall (a rainfall may be a round of rainfall process including multiple rainfall) in a future period of time and the scale of the rainfall (characterized by rainfall) exceeds a first preset standard, it indicates that there is high-intensity rainfall in the future period of time, so that the collection of the rainwater is needed in the future period of time, and the collected rainwater at the current moment needs to be discharged in advance, so that the current treatment mode of the rainwater and sewage is determined to be a temporary storage mode. As the name suggests, the temporary storage mode is used for temporarily storing rainwater, and aims to quickly digest the rainwater runoff on the ground, but the rainwater is required to be drained under certain conditions after digestion, so that a digestion space is reserved for the subsequent concentrated rainfall in the flood season, the next runoff of heavy rain is conveniently consumed and delayed on site, the flood peak flow is reduced from the source, and the flood control and waterlogging prevention purposes are realized.
In addition, since urban rainfall and waterlogging mainly occur in the flood season of concentrated rainfall, the conventional municipal pipe network can basically cope with normal rainfall at ordinary times. Therefore, the weather and season features and rules of the place and the current date and time can be further combined to judge whether the current moment is in the flood season and at which stage of the flood season. When the system is in the flood season, a plurality of times of heavy rainfall processes are indicated, and the current rain sewage treatment mode can be determined to be a temporary storage mode. However, due to the difference of geographic positions, the flood season and the non-flood season can be clearly distinguished in northern or northern-deviation areas; for areas in the south or the south, rainfall is balanced in different time sections, basically no flood season in which the rainfall is very concentrated exists, and the current rain sewage treatment mode is determined by adopting real-time weather information and weather forecast information.
Step S30: according to the treatment mode, the rain sewage is conveyed to a purification unit to be purified in a corresponding mode and stored after being purified;
step S31: for the temporary storage mode, after sequentially passing through the pretreatment module and the microporous filtration module of the purification unit, the rainwater and the sewage enter the water storage unit for temporary storage in a mode that the rainwater and the sewage do not stay or stay time is less than a preset time length after passing through the natural purification module;
specifically, through step S30 and step S31, purification of the collected rain sewage is achieved, and pollution control while waterlogging control is achieved. The collected rain water and sewage generally carry large-particle garbage (plastics, branches, blades, pericarps, silt and the like), particularly the rain water in the early period of rainfall has serious general pollution, and is purified by a purification unit in order to prevent pipe blockage and garbage pollution caused by drainage into a sewer pipe and rivers and lakes. The pretreatment module is mainly used for removing large-particle garbage; the later microporous filter module is mainly used for removing suspended matters (suspended solids) in the rainwater runoff and preventing the suspended matters from entering the subsequent purification module; the final natural purification module is mainly used for realizing the comprehensive effects of deep physical purification, chemical purification, biological purification and ventilation reoxygenation in the long-time water storage process, so that the quality of the discharged water can reach the relevant standards of urban reclaimed water reuse (urban miscellaneous water, landscape environment water and the like).
For the temporary storage mode, as the main function is to quickly absorb the rainwater runoff and the rainwater is only temporarily stored, the purification degree is not required, and the pretreatment module and the microporous filter module are basically only required to remove the particulate matters, and the particulate matters are directly purified or stopped slightly in the natural purification module, so that the cleaning is determined according to the situation; for example, if the current rainfall is large in rainwater quantity, the rainfall is directly passed through the natural purification module without stopping, so that the most rapid digestion of the ground rainwater runoff is realized; if the quantity of the raining water is smaller at present, the raining water can stay slightly, and the raining water can be purified to a certain degree.
Step S40: when the output conditions under the corresponding processing modes are met, the stored purified water is conveyed to the corresponding application scene;
step S41: for the processing mode to be a temporary storage mode, the output condition comprises that before the next rainfall comes, the application scene comprises water bodies such as rivers, lakes, reservoirs and the like;
specifically, through step S40 and step S41, the reuse of the purified rain water is realized. The purification degree of the rainwater in the temporary storage mode generally cannot reach the reuse mark, so that the rainwater is directly discharged into water bodies such as rivers, lakes, reservoirs and the like. The discharge timing mainly considers digestion of the rainwater of the next rain, or the current stored rainwater quantity exceeds a capacity threshold, namely reaches the vicinity of a warning line, and the stored rainwater is selected to be discharged at the moment. When the current stored rainwater amount exceeds the capacity threshold, the rainwater can be actively discharged, and the overflow structure can be utilized for passive discharge.
Step S411: for the temporary storage mode, determining a conveying mode of the stored purified water according to the scale of the next rainfall;
step S412: if the scale of the next rainfall exceeds a second preset standard, determining that the conveying mode is an emptying mode, and outputting all the currently stored purified water;
specifically, when the scale of the next rainfall exceeds the second preset standard, the scale (rainfall) of the next rainfall on the surface is large, and a waterlogged flood peak is easy to form, so that runoffs of the rainwater are required to be rapidly digested, and the current stored clean water is emptied, so that the maximum rapid digestion capacity is provided for the next rainfall.
Step S413: if the rainfall scale of the next rainfall does not exceed the second preset standard, determining that the conveying mode is a quantitative mode, and outputting a certain amount of purified water according to the stored quantity of the purified water stored currently so as to vacate a storage space for absorbing the rainfall of the next rainfall;
specifically, when the scale of the next rainfall does not exceed the second preset standard, the scale (rainfall) of the next rainfall on the surface is smaller, and a waterlogging flood peak is basically not formed, so that the rapid digestion requirement on the rainfall runoff is not high, quantitative discharge can be carried out according to the current purified water reserve, and only a storage space for absorbing the next rainfall is needed to be vacated, and the emptying is not needed.
The temporary storage mode-based control method provided in the embodiment mainly utilizes temporary storage and discharge of rainwater, namely intermittent collection and emptying of the rainwater, can achieve rapid digestion of the rainwater runoff, timely consumes the rainwater runoff of low-lying ponding points, achieves the purpose of local water storage and flood prevention, and ensures flood prevention safety. And after temporary storage for a period of time, the water is discharged after meeting certain conditions, so that the pressure of rainwater on water bodies such as rivers, lakes, reservoirs and the like at the same time can be reduced, and the temporary storage is utilized to stagger the raining peaks and then discharge the water bodies such as the rivers, the lakes, the reservoirs and the like, so that flood peaks are avoided.
Further, the method of the embodiment further includes:
step a: acquiring the total operation time of the microporous filter module in the purification unit after the previous cleaning;
step b: when the total operation time length meets the preset time length, back flushing and cleaning are carried out on the microporous filter module by utilizing the stored purified water;
specifically, the step a and the step b are mainly cleaning processes of the microporous filter module, and the processes and the steps 10 to 41 are not in fixed sequence, but the time period of centralized absorption and purification of rainwater is generally needed to be avoided, and the steps can be synchronously carried out in the stage of outward conveying of the rainwater. And when the rainwater is conveyed, a part of the rainwater is conveyed into a back flushing unit to back flush the microporous filtering module.
In addition, the basis for cleaning the microporous filter module is basically the blocking degree reflected by the change of the water permeability, but in practical application, the water permeability is troublesome to determine, so that the cleaning time is simplified to be determined according to the operation time related to the water permeability.
Example 2
The present embodiment mainly illustrates the operation principle of the waterlogging prevention method of the present invention in a long-term water storage mode as a treatment mode. The same content has been described in embodiment 1, and this embodiment will not be described again.
The invention provides a water-safe sponge urban rainwater treatment and reuse method, which comprises the following steps:
step S10: collecting rain sewage on the ground and a rain pipe network;
step S20: determining a rainwater processing mode according to current weather information and weather forecast information, wherein the current weather information and the weather forecast information comprise whether rainfall and rainfall are large or not;
step S21: determining whether rainfall exists and the scale of the rainfall in a certain time range in the future according to the current weather information and the weather forecast information;
step S22: determining whether rainfall exists or not in a certain time range in the future but the scale does not exceed a first preset standard, and determining that the treatment mode of the rain sewage is a long-term water storage mode;
specifically, according to the current weather information and the weather forecast information, the rainfall condition in a future period of time after the current moment can be determined, and the current rain sewage treatment mode is determined according to the rainfall condition in the future period of time.
If no rainfall exists in a future period of time, the requirements for collecting and absorbing the rainwater do not exist in a corresponding future period of time, and the currently collected rainwater and sewage can be stored for a long time after being purified for later water use. If there is a rainfall (which may be a single rainfall or a course of rainfall including multiple rainfall) for a period of time in the future and the scale of the rainfall (characterized as rainfall) does not exceed a first preset standard, then it is indicated that there may be a small intensity of rainfall for a period of time in the future, while for a smaller intensity of rainfall, the original municipal rainwater pipe network can basically cope with, so that the requirements for collecting and absorbing the rainwater and the degree of pressure are not high in the corresponding period of time in the future, and the currently collected rainwater and sewage are not discharged for the corresponding period of time in the future to make room, so that it can be determined that the current rainwater and sewage treatment mode is a long-term water storage mode. As the name suggests, the long-term water storage mode is for long-term storage of stormwater, which is aimed at long-term storage and delivery when there is a water demand to meet the corresponding water demand.
Step S30: according to the treatment mode, the rain sewage is conveyed to a purification unit to be purified in a corresponding mode and stored after being purified;
step S31: for the long-term water storage mode, after sequentially passing through a pretreatment module and a microporous filtration module of the purification unit, the rainwater enters a natural purification module and is kept stand for a preset time period and/or enters a water storage unit for long-term storage after reaching the urban sewage recycling standard;
specifically, for long-term water storage, as the main function is to cope with subsequent water, the purification degree is required to be high, the pretreatment module and the microporous filtration module are required to remove particulate matters in the treatment, the pretreatment module is required to stay in the natural purification module for a preset time, the specific value of the preset time can be set according to the situation, and further, whether the purification is completed or not can be comprehensively determined by combining with the urban sewage recycling standard.
Step S40: when the output conditions under the corresponding processing modes are met, the stored purified water is conveyed to the corresponding application scene;
step S41: for the treatment mode of a long-term water storage mode, the output conditions comprise that the water used in dry seasons or the stored rainwater exceeds the capacity threshold value of the water storage unit, and the application scenes comprise urban miscellaneous water, urban landscape environment water, a water seepage well for recharging stratum, and water bodies such as a back-filled river, a lake, a reservoir and the like;
specifically, after long-time physical filtration, chemical reaction, biological action, ventilation reoxygenation and other natural purification actions, the effluent can reach the relevant reuse standard of urban reclaimed water, and then the purified water is output when the output condition is met according to the water demand. For example, for northern areas, the rainwater stored in summer season is transferred to dry season for use, and the output condition is the water for the dry season, so that the space-time conversion of rainwater resources is realized, the drought resistance of the city is improved, and the problem of drought and water shortage in winter and spring of northern cities is solved. And for the southern areas where no dry season exists, the output condition can be city demand water. When in transportation, the water is pumped out by the water pump, and the device is applied to aspects of urban ecology, environment, greening, watering, car washing, dust fall, landscape, fire protection, construction and the like, and meanwhile, purified rainwater can recharge stratum through the seepage well so as to supplement and conservation underground water sources.
Example 3
The embodiment mainly explains the principle of preventing and controlling waterlogging by switching multiple modes in a complete rainfall process. The same content is described in embodiment 1 and embodiment 2, and this embodiment is not repeated.
The invention provides a water-safe sponge urban rainwater treatment and reuse method, which comprises the following steps:
step S10: collecting rain sewage on the ground and a rain pipe network;
step S20: determining a treatment mode of the rain sewage according to current weather information and weather forecast information, wherein the current weather information and the weather forecast information comprise whether rainfall and rainfall;
step S21: determining that rainfall exists in a certain time range in the future and the scale exceeds a first preset standard, and determining that a treatment mode of the rain sewage is a temporary storage mode;
step S30: according to the treatment mode, the rain sewage is conveyed to a purification unit to be purified in a corresponding mode and stored after being purified;
step S31: for the temporary storage mode, after sequentially passing through the pretreatment module and the microporous filtration module of the purification unit, the rainwater and the sewage enter the water storage unit for temporary storage in a mode that the rainwater and the sewage do not stay or stay time is less than a preset time length after passing through the natural purification module;
step S40: when the output conditions under the corresponding processing modes are met, the stored purified water is conveyed to the corresponding application scene;
step S41: for the processing mode to be a temporary storage mode, the output condition comprises that before the next rainfall comes, the application scene comprises water bodies such as rivers, lakes, reservoirs and the like;
step S50: the tail sound of a round of rainfall process at the current moment is determined, whether rainfall exists in a certain time range or not in the future is determined, the scale of the tail sound does not exceed a first preset standard, and the treatment mode of the rain sewage is determined to be a long-term water storage mode;
step S60: according to the treatment mode, the rain sewage is conveyed to a purification unit to be purified in a corresponding mode and stored after being purified;
step S61: for the long-term water storage mode, after sequentially passing through a pretreatment module and a microporous filtration module of the purification unit, the rainwater enters a natural purification module and is kept stand for a preset time period and/or enters a water storage unit for long-term storage after reaching the urban sewage recycling standard;
step S70: when the output conditions under the corresponding processing modes are met, the stored purified water is conveyed to the corresponding application scene;
step S71: for the treatment mode of long-term water storage, the output conditions comprise that the water used in dry seasons or the stored rainwater exceeds the capacity threshold value of the water storage unit, and the application scenes comprise urban miscellaneous water, urban landscape environment water, a water seepage well for recharging stratum, and water bodies such as a back-filled river, a lake, a reservoir and the like.
Example 4
The embodiment mainly describes the pre-control flow of the purification unit when the waterlogging prevention method is used for dealing with rainwater with different pollution degrees. The same content has been described in the foregoing embodiments, and this embodiment is not repeated.
The invention provides a water-safe sponge urban rainwater treatment and reuse method, which comprises the following steps:
step S10: collecting rain sewage on the ground and a rain pipe network;
step S20: determining a rainwater processing mode according to current weather information and weather forecast information, wherein the current weather information and the weather forecast information comprise whether rainfall and rainfall are large or not;
step S30: determining the pollution information of the collected rain sewage, and judging the pollution degree of the rain sewage, wherein the pollution information at least comprises the concentration of the particles in the collected rain sewage and the main concentration range of the granularity value;
step S31: determining a target microporous filter module with a specification matched with the microporous filter module in the microporous filter module of the purification unit according to the pollution degree determined by the pollution information of the collected rain sewage, wherein the specification of the microporous filter module mainly comprises materials, filter hole sizes, the number of filter layers, the total thickness and the like;
specifically, the material of the microporous filter module is mainly related to the PH value, heavy metal ion type and content and other parameters of rainwater, and the normal operation of filtration and the service life of the microporous filter module are related. The size of the filter holes of the microporous filter module is mainly required to be matched with the concentration of the particulate matters of the rainwater and the main concentration range of the granularity, if the value of the main concentration range of the granularity is larger, the size of the filter holes of the target microporous filter module can be matched with the size of the filter holes of the microporous filter module or smaller in theory, and the concentration of the particulate matters is further referred to; if the concentration is larger, the filtration effect can be improved by using a target microporous filtration module with smaller filter holes, but the possibility of occurrence of clogging is higher. Therefore, this needs to be further determined according to the requirements for the degree of rainwater purification.
In addition, the number of filter layers, the overall thickness of the microporous filter module are mainly related to the particulate matter concentration of rainwater and the rainfall. In principle, the higher the concentration of pollutants is, the microporous filter module with a large number of filter layers and a large thickness is needed to ensure the filtering effect, but the large number of filter layers and the large total thickness can increase the flow resistance of rainwater and reduce the instantaneous flow. Therefore, the number of filter layers and the overall thickness specification of the microporous filter module need to be comprehensively determined with reference to the amount of rain, the purification degree requirement (treatment mode), and the particulate matter concentration of the rain (pollution information of the rain).
Step S32: acquiring the total operation time of the microporous filter module in the purification unit after the previous cleaning, and determining the blocking degree (water permeability) of the microporous filter module according to the acquired total operation time;
in particular, in principle, the pollution information of the rain water is related to the water permeability (clogging degree) of the microporous filter module, and the water permeability is related to the total operation time of the microporous filter module since the last cleaning, and the larger the operation total time is, the smaller the water permeability is.
Step S33: according to the blocking degree of the microporous filter module and the pollution information of the rain sewage, the stored purified water is utilized to carry out back flushing cleaning on the microporous filter module;
specifically, according to the pollution information of the current rain sewage and the total operation time of the microporous filter module after the last cleaning, whether the microporous filter module needs to be cleaned in advance can be judged, so that the treatment effect of the rain sewage with corresponding pollution information is ensured.
When the target microporous filter module is cleaned, the collected rainwater can be conveyed to the transition temporary storage Chi Zancun, and after the target microporous filter module is cleaned, the rainwater in the transition temporary storage pool is conveyed to the target microporous filter module. The collected rainwater can be conveyed to the standby microporous filter module for normal filtering operation when the target microporous filter module is cleaned, and the rainwater and sewage are switched to the target microporous filter module after the target microporous filter module is cleaned; a standby microporous filter module with proper specification and capability of coping with most situations can be arranged according to the basic particulate matter concentration and the main concentration range of the granularity of the polluted rainwater determined by the environment and the climate of the place.
Step S40: according to the treatment mode, the rain sewage is conveyed to a purification unit to be purified in a corresponding mode and stored after being purified;
step S41: for the temporary storage mode, after sequentially passing through the pretreatment module and the microporous filtration module of the purification unit, the rainwater and the sewage enter the water storage unit for temporary storage in a mode that the rainwater and the sewage do not stay or stay time is less than a preset time length after passing through the natural purification module;
step S42: for the long-term water storage mode, after sequentially passing through a pretreatment module and a microporous filtration module of the purification unit, the rainwater enters a natural purification module and is kept stand for a preset time period and/or enters a water storage unit for long-term storage after reaching the urban sewage recycling standard;
step S50: and when the output conditions under the corresponding processing modes are met, conveying the stored purified water to the corresponding application scene.
Example 5
The embodiment mainly illustrates the specific application of the waterlogging prevention method in response to the surge of the rainstorm. The same content has been described in the foregoing embodiments, and this embodiment is not repeated.
The invention provides a water-safe sponge urban rainwater treatment and reuse method, which comprises the following steps:
step S10: collecting rain sewage on the ground and a rain pipe network;
step S20: determining a treatment mode of the rain sewage according to current weather information and weather forecast information, wherein the current weather information and the weather forecast information comprise whether rainfall and rainfall;
step S21: judging the abnormal weather of heavy rain according to the current weather information and weather forecast information, and determining that the processing mode of the rainwater is a temporary storage mode;
specifically, the rainstorm abnormal weather proposed in the present embodiment, that is, the current rainfall exceeds the conventional value, predefines the rain sewage treatment mode in the rainstorm weather, which is essentially independent of whether there is rainfall in the future and the magnitude of the rainfall scale, can be directly determined as the temporary storage mode.
Step S30: according to the treatment mode, the rain sewage is conveyed to a purification unit to be purified in a corresponding mode and stored after being purified;
step S31: for the temporary storage mode in the abnormal rainstorm weather, rainwater is respectively conveyed to a transition temporary storage pool and a corresponding microporous filter module after passing through a sewage blocking pretreatment module of a purification unit, the rainwater flow rate input into the microporous filter module is controlled not to exceed a preset upper limit value, and then the rainwater is controlled to enter a water storage unit for temporary storage after passing through a natural purification module in a non-stay mode;
specifically, under the abnormal weather of heavy rain, the rainwater flow exceeds the upper load limit of the microporous filter module, and partial rainwater can be input into the transition temporary storage pool for temporary storage at the moment, so that the pressure of the microporous filter module is reduced. If the standby microporous filter module is provided, the standby microporous filter module can be additionally started to share the rainwater treatment pressure.
Step S32: synchronously starting the surface dirt scraping and cleaning of the microporous filter module, and keeping the microporous filter module continuously running in the process of stormy abnormal weather;
step S40: when the output conditions under the corresponding processing modes are met, the stored purified rain sewage is conveyed to the corresponding application scene;
step S41: for temporary storage modes in stormwater abnormal weather, the output condition is that the stored rainwater exceeds the capacity threshold of the water storage unit, and the application scene comprises water bodies such as rivers, lakes, reservoirs and the like.
The water safety type sponge urban rainwater treatment and recycling method provided by the invention can realize water storage and waterlogging prevention, comprehensive pollution control and fresh-keeping recycling. By utilizing the rainwater seepage, reducing runoff and regulating flood peak, the on-site water storage and waterlogging prevention are realized; the source emission reduction is realized by utilizing in-situ dirt interception, high-efficiency filtration and natural purification; the open source throttling is realized by ventilation reoxygenation, fresh-keeping and water storage and on-site recycling. Meanwhile, the method has the advantages of ecology, environmental protection, energy conservation, low carbon and simple operation and maintenance.
In the description of the present invention, it should be understood that the terms "upper," "lower," "bottom," "top," "front," "rear," "inner," "outer," "left," "right," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.
Claims (10)
1. The utility model provides a water safety type sponge urban rainwater treatment and reuse method which is characterized by comprising the following steps:
collecting rain sewage on the ground and a rain pipe network;
determining a treatment mode of the rain water according to the current weather information and the weather forecast information;
according to the treatment mode, conveying the rain sewage to a purification unit for purification in a corresponding mode and storing after purification;
and when the output conditions under the corresponding processing modes are met, conveying the stored purified water to the corresponding application scene.
2. The method for processing and recycling water safety type sponge urban rainwater according to claim 1, wherein the current weather information and weather forecast information comprise whether rainfall and rainfall amount are included.
3. The method for treating and recycling water-safe sponge urban rainwater according to claim 1 or 2, wherein determining the treatment mode of the rainwater and sewage according to the current weather information and weather forecast information comprises:
determining whether rainfall exists and the scale of the rainfall in a certain time range in the future according to the current weather information and the weather forecast information;
if rainfall exists in a certain time range in the future and the scale exceeds a first preset standard, determining that the rain sewage treatment mode is a temporary storage mode;
and if no rainfall exists or the rainfall exists within a certain time range in the future but the scale does not exceed a first preset standard, determining that the treatment mode of the rain sewage is a long-term water storage mode.
4. A method of treating and reutilizing urban rainwater with water safety type sponge according to claim 3, wherein, according to the treatment mode, the rainwater and sewage are transported to a purifying unit for purification in a corresponding mode and storage after purification, comprising:
for the temporary storage mode, after sequentially passing through the pretreatment module and the microporous filtration module of the purification unit, the rainwater and the sewage pass through the natural purification module in a way of no stay or stay time less than a preset time length and then enter the water storage unit for temporary storage;
for the long-term water storage mode, the rain sewage enters the natural purification module after sequentially passing through the pretreatment module and the microporous filtration module of the purification unit, and enters the water storage unit for long-term storage after staying and standing for a preset time.
5. The method for treating and recycling water-safe sponge urban rainwater according to claim 4, further comprising:
for the long-term water storage mode, the rain sewage enters a natural purification module and enters a water storage unit for long-term storage after standing still for a preset time period and/or reaching the urban sewage recycling standard.
6. A water safety type sponge urban rainwater treatment and reuse method according to claim 3, wherein the output conditions comprise:
for the processing mode being a temporary storage mode, the output condition comprises that the next rainfall comes before;
for the treatment mode being a long term water storage mode, the output conditions include dry season water.
7. The method for treating and recycling water-safe sponge urban rainwater according to claim 6, wherein the stored purified water is delivered to the corresponding application scene, further comprising:
for the temporary storage mode, determining the transportation mode of the stored purified water according to the scale of the next rainfall;
if the scale of the next rainfall exceeds a second preset standard, determining that the conveying mode is an emptying mode, and outputting all the current stored purified water;
and if the rainfall scale of the next rainfall does not exceed the second preset standard, determining that the conveying mode is a quantitative mode, and outputting a certain amount of purified water according to the stored quantity of the purified water stored currently so as to vacate a storage space for absorbing the rainfall of the next rainfall.
8. The method for treating and recycling water-safe sponge urban rainwater according to claim 3, wherein the application scene comprises:
for the processing mode being a temporary storage mode, the application scene comprises water bodies such as rivers, lakes and the like;
for the treatment mode, a long-term water storage mode is adopted, and the application scene comprises urban miscellaneous water, urban landscape environment water, a water seepage well for recharging stratum, and water bodies such as a back-filled river, a lake, a reservoir and the like.
9. The water safety type sponge city rainwater treatment and reuse method according to claim 1, further comprising:
acquiring the total operation time of the microporous filter module in the purification unit after the previous cleaning;
and when the total operation time length meets the preset time length, back flushing and cleaning the microporous filter module by utilizing the stored purified water.
10. The water safety type sponge city rainwater treatment and reuse method according to claim 1, further comprising:
judging the pollution degree of the rain sewage;
and conveying the rain sewage to a corresponding purification module in the purification unit according to the pollution degree.
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| CN202111656483.7A CN116427511A (en) | 2021-12-30 | 2021-12-30 | Water safety type sponge urban rainwater treatment and reutilization method |
| PCT/CN2022/076033 WO2023123618A1 (en) | 2021-12-30 | 2022-02-11 | Rainwater treatment and recycling method for water-safety sponge city |
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| JP6270337B2 (en) * | 2013-04-26 | 2018-01-31 | 株式会社東芝 | Water treatment equipment and water treatment system |
| CN105804199A (en) * | 2016-04-13 | 2016-07-27 | 武汉美华禹水环境有限公司 | Low-influence treatment method of rainwater of general water quality |
| CN205935042U (en) * | 2016-08-22 | 2017-02-08 | 河南省建筑科学研究院有限公司 | Sponge urban rainwater processing system |
| CN107587579B (en) * | 2017-09-30 | 2023-11-17 | 武汉圣禹排水系统有限公司 | Drainage system with sewage interception pipe and rainwater treatment facility and drainage control method |
| CN111651885B (en) * | 2020-06-03 | 2023-06-06 | 南昌工程学院 | Intelligent sponge city flood forecasting method |
| CN212534410U (en) * | 2020-06-24 | 2021-02-12 | 中建水务环保有限公司 | Drainage pipe network regulation system that dams |
| CN112560209B (en) * | 2020-12-01 | 2022-06-10 | 重庆华悦生态环境工程研究院有限公司 | Initial rainwater collection and scheduling method and system |
| CN112904455B (en) * | 2021-01-15 | 2022-07-12 | 常州工学院 | Early warning and management and control method and device for coping with short-time strong rainfall community source |
| CN112989538B (en) * | 2021-03-30 | 2022-08-05 | 清华大学 | Control method and control device for urban drainage system |
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