CN110847518B

CN110847518B - Industrial factory building initial rainwater collecting and processing system and collecting and processing method thereof

Info

Publication number: CN110847518B
Application number: CN201911149299.6A
Authority: CN
Inventors: 谢飞; 伍春晖; 王向华; 李冰
Original assignee: Jiangsu Academy Of Environmental Industry Technology And Technology Corp ltd
Current assignee: Jiangsu Academy Of Environmental Industry Technology And Technology Corp ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2021-03-19
Anticipated expiration: 2039-11-21
Also published as: CN110847518A

Abstract

The invention discloses a system and a method for collecting and treating initial rainwater of an industrial factory building, and belongs to the technical field of rainwater treatment. The method comprises the following steps: set up the gutter at factory building roof edge, with the gutter communicates with each other and will the gutter falls into the drain pipe of the vertical direction of many divisions equally, evenly distributed at the peripheral a plurality of factory building cut dirty device, lead to pipe with cut the diverging device that dirty device is linked together to and lead to pipe with the communicating rainwater processing apparatus of diverging device. According to the invention, the gutter is arranged on the periphery of the factory building, the middle part of the bottom surface of the gutter is obliquely arranged to be higher than the part connected with the drain pipe, and the distance from the middle position of each gutter to the adjacent sewage interception device is equal, so that the technical problems of increased wastewater treatment capacity and increased treatment cost caused by excessive rainwater collection in the prior art are solved.

Description

Industrial factory building initial rainwater collecting and processing system and collecting and processing method thereof

Technical Field

The invention belongs to the technical field of rainwater treatment, and particularly relates to an initial rainwater collection and treatment system for an industrial factory building and a collection and treatment method thereof.

Background

In recent years, with the steady advance of the national 'action plan for preventing and controlling water pollution', the environmental quality of surface water is greatly improved, the production wastewater of enterprises is basically collected, classified and classified to be discharged after reaching standards, the phenomena of stealing discharge and leakage discharge are restrained, but enough attention is not paid to the initial rainwater collection treatment of plant areas, on one hand, the state lacks the relevant rainwater discharge standard at present, on the other hand, the rainwater collection mode is not clearly defined, so that the initial rainwater of some enterprises, especially some heavily polluted enterprises (chemical industry, printing and dyeing, steel, petrochemical industry, smelting, electroplating and hazardous waste disposal) is not fully collected, and the polluted rainwater enters the surface water environment. It is known that the pollutants of rainwater on the ground of industrial enterprises vary with the properties of plants, and the pollutants have complex components and more varieties, and the concentration of partial pollutants, such as COD, nitrogen, heavy metals and the like, is high, so that the environmental quality of surrounding surface water is easily deteriorated by improper collection and treatment.

At present, an initial rainwater collecting pool is built in a plant area, rainwater in the plant area is collected to the initial rainwater collecting pool through a collecting pipeline or a ditch, the volume of the initial rainwater collecting pool is according to a local rainstorm intensity formula, the rainwater amount in a set time before collection is used as a design value, a water inlet is automatically closed when the water amount of the collecting pool reaches the design value, and the rainwater directly enters a rainwater discharge port to be discharged.

Each regional rainwater of factory gets into initial stage rainwater collecting pit through collection system and needs certain flow through time, the regional rainwater that is close to initial stage rainwater collecting pit can guarantee that the initial stage rainwater in the set time is whole to be collected, and can too much collect the rainwater in the set time, the initial stage rainwater in the set time before the region far away from initial stage rainwater collecting pit does not yet reach initial stage rainwater collecting pit, initial stage rainwater collecting pit gate valve has been closed, if wait to reach the initial stage rainwater collecting pit in the set time before the distance, so near regional rainwater collection volume is far more than in the set time, will increase initial stage rainwater pond volume, also increase waste water treatment capacity, and diluted by the clean rainwater in later stage, increase the processing degree of difficulty. Not only increasing the investment cost, but also not achieving the purpose of pollutant collection control, and being unreasonable in technical and economic aspects.

Disclosure of Invention

The invention provides a system and a method for collecting and processing initial rainwater of an industrial factory building, which aim to solve the technical problems in the background technology.

The invention is realized by the following technical scheme: the utility model provides a processing system is collected to industry factory building initial stage rainwater, includes: the drainage system comprises a gutter arranged at the edge of a roof of a factory building, a plurality of drainage pipes which are communicated with the gutter and divide the gutter into a plurality of equal parts in the vertical direction, a plurality of sewage interception devices which are uniformly distributed at the periphery of the factory building, a flow dividing device communicated with the sewage interception devices through water pipes, and a rainwater treatment device communicated with the flow dividing device through water pipes;

the sewage interception device is connected with the adjacent drain pipe through a water pipe, the rainwater treatment device collects the treated rainwater into the same water collecting pool through the water pipe, and the flow distribution device also collects the later rainwater into the water collecting pool through the water pipe;

the middle part of the gutter between the adjacent drain pipes is higher than the part connected with the drain pipes, the bottom surface is obliquely arranged, and the distance from the bottom end of each drain pipe to the sewage interception device adjacent to the bottom end of each drain pipe is equal.

In a further embodiment, a nitrogen removal device is arranged in the middle of the drain pipe, and comprises: with the clamp that the drain pipe cup jointed each other, with the bottom integrated into one piece's of clamp water service pipe, fixed cup joint on the water service pipe and with drain pipe fixed connection's sealing washer, the transmission connect in the water service pipe with elastic packing circle between the drain pipe filters the nitrogen that is mingled with in the initial stage rainwater, has fully utilized the space of drain pipe to this nitrogen removal device is through clamp connection between the drain pipe, and the installation and dismantlement of being convenient for carry out regular maintenance and repair, carry out the change of elastic packing circle when necessary.

The elastic packing ring comprises a plurality of elastic packing strips, the upper ends and the lower ends of the elastic packing strips gradually extend towards the drain pipe and are in contact with the drain pipe, a gap is reserved between the middle position of each elastic packing strip and the drain pipe, and the upper ends and the lower ends of the adjacent elastic packing strips are respectively connected in series through steel wires to form a cylinder shape; the middle position of the elastic filler strip is flush with the inner wall of the water service pipe, so that rainwater can directly contact with the elastic filler strip, the contact area between the rainwater and the elastic filler strip is increased, and the nitrogen filtration is improved.

Elastic packing strip and drain pipe between be connected through the slip subassembly transmission, the slip subassembly includes: the limiting wheel is movably embedded in the outer wall of the elastic filler strip, and the limiting groove is formed in the inner wall of the drainage pipe; the limiting wheels are positioned in the corresponding limiting grooves. Elastic filler strip has certain slip function in the finite length of spacing groove, is for after the elastic filler strip adsorbs to certain degree even saturation, the position at regulation place that can be by oneself avoids causing outside extrusion to the drain pipe.

In a further embodiment, the clip includes: the water pipe cutting device comprises a rotating shaft and a plurality of blades, wherein the rotating shaft is installed at the radial position of the bottom end of the hoop through a bearing, the blades are fixedly installed along the axial direction of the rotating shaft, the blades are semicircular, and the edge parts of the blades are located in a water pipe;

the blade is used for preventing solid matters from blocking the channel; simultaneously, the rainwater on the menstrual flow hoop is lifted, so that the rainwater is forced to slide down along the inner wall of the elastic packing ring, and the rainwater purification effect of the elastic packing ring is improved.

In a further embodiment, the sewage interception device comprises: the sewage interception device comprises a sewage interception barrel, a water inlet arranged at the top of the sewage interception barrel, a discharge port arranged at the bottom of the sewage interception barrel, a boss which is arranged on the inner wall of the sewage interception barrel and is flush with the water inlet, and a sewage interception fence which is movably connected with the boss and is positioned in the sewage interception barrel. For intercepting solid waste debris or uncrushed solid matter after the blade crushing in the drain.

In a further embodiment, the sewage interception bar comprises: the clamping device comprises a lower clamping ring placed on the boss, a plurality of connecting plates vertically fixed at the edge of the lower clamping ring, an upper clamping ring fixedly connected to the top of each connecting plate, a plurality of partition plates fixed at the inner wall of the lower clamping ring and penetrating through the boss to extend downwards, a fixing plate fixed at the bottom of each partition plate, and fixing rings which are circled at the outer sides of the partition plates at equal intervals;

the distance between the adjacent connecting plates is far greater than that between the adjacent partition plates, the connecting plates and the partition plates are fixed along the radial direction of a circle where the connecting plates and the partition plates are located, and the partition plates are used for intercepting crushed debris.

In a further embodiment, the flow diversion device comprises: the water inlet is arranged on one side of the top end of the shunting barrel, the flow guide port is arranged on the other side of the top end of the shunting barrel, the flow discarding port is arranged at the bottom of the shunting barrel, the shunting cover is fixed on the inner wall of the shunting barrel, the control port is arranged in the middle of the shunting cover, the floating ball is placed below the shunting cover, and the electronic valve is arranged at the flow discarding port; when the floating ball is jacked up, the control port can be just sealed. Carry out effectual separation to initial stage rainwater and later stage rainwater, effectual control prevents to collect too much rainwater to the collection of initial stage rainwater, leads to the handling capacity increase.

In a further embodiment, the flow dividing cover is of a conical structure and plays a role in guiding the floating ball, the floating ball directly floats to the control port of the flow dividing cover, and a sealing ring is fixed below the edge of the control port on the flow dividing cover; the flow dividing cylinder is divided into a flow guiding chamber and a flow abandoning chamber positioned below the flow guiding chamber by the flow dividing cover;

calculating the opening and closing time T of the electronic valve: the height of the flow dividing cover is h, half of the length, the width and the height of the flow abandoning chamber are R, the rainwater overflow quantity at the control port is S, the volume of the floating ball is ignored,

then

Wherein the over-flow rate S ═ S_{Cutting block}*v，S_{Cutting block}To control the cross-sectional area of the opening, v is the velocity of the rainwater, t₁The time for rainwater at the middle position of the gutter to reach the control port in the flow dividing device is represented as the time;

v is qF psi, wherein F is catchment area, psi is runoff coefficient;

q is the intensity of the rainstorm, p is the period of recurrence, A_tThe rainfall parameter is a rainfall parameter, C is a rainfall variation parameter, b is a rainfall duration correction parameter, n is a rainstorm attenuation index, and t is the rainfall time of initial rainwater.The time for closing the electronic valve is effectively calculated, and the initial rainwater is completely collected and a small amount of later rainwater is collected.

In a further embodiment, the stormwater treatment device comprises: the water inlet is arranged at one end of the shell, and the water outlet is arranged at the other end of the shell; the shell close to one end of the water inlet is of a solid structure, and the shell close to one end of the water outlet is of a hollow structure;

the rainwater treatment device further comprises: the adsorption pipes are transversely inserted into the solid structure in a penetrating mode, one ends of the adsorption pipes are communicated with the water inlet, the other ends of the adsorption pipes are communicated with the hollow structure, and the adsorption pipes are made of manganese sand or anthracite; set up the effect that a plurality of adsorption tube played the reposition of redundant personnel to the rainwater here, increased the area of contact of adsorption tube with the rainwater, improved the adsorption efficiency.

The rainwater treatment device further comprises: and the filter cotton is vertically fixed in the hollow structure.

In a further embodiment, a flow stopping valve is arranged between the flow abandoning port of the flow dividing device and the water inlet of the casing of the rainwater treatment device, and the flow stopping valve comprises: the water pipe is connected with the left connecting pipe of the flow abandoning port, the right connecting pipe is communicated with the water inlet of the shell and is tightly connected with the left connecting pipe, the containing cavity is arranged at the left end of the right connecting pipe, the claw-shaped placing frame is fixed at the inner wall of the right end of the containing cavity, the movable rod is movably inserted in the claw-shaped placing frame, the stop block is fixed at the left end of the movable rod, and the conical spring ring is sleeved outside the claw-shaped placing frame and is fixedly connected with the stop block;

when the conical spring ring is free from any external force, the stop block is abutted against the left connecting pipe. Because of initial stage rainwater just directly shunts after getting into rainwater processing apparatus, and reduces and the general flow because of the cross section of adsorption tube diminishes, so cause the phenomenon against the current very easily, if the place produces against the current when being about to close the electronic valve, will directly lead to the collection of initial stage rainwater incomplete, so set up the flow stopping valve before rainwater processing apparatus, prevent that the rainwater from flowing against the current.

The collecting and processing method using the industrial factory building initial rainwater collecting and processing system specifically comprises the following steps:

step one, when rainfall does not exist, an electronic valve in the flow dividing device is in an open state, the interior of the flow abandoning chamber is empty, and a floating ball is positioned at the bottom of the flow abandoning chamber;

timing when rainfall begins, enabling rainwater to flow to a drain pipe along the inclined direction of a gutter, enabling the rainwater to flow to a nitrogen removal device in the drain pipe, firstly, carrying out corresponding treatment on solid waste matters by a blade in the nitrogen removal device under the action of water flow, and carrying out flying on water at the position of a channel, wherein the lifted water flow is beaten to an elastic packing ring in the nitrogen removal device, and the elastic packing ring carries out nitrogen removal on the lifted water flow;

thirdly, the rainwater slides down into a drain pipe along the elastic packing ring, flows into a sewage interception device, and is subjected to solid-liquid separation, and small particles or untreated solids obtained after the blades are crushed are separated from the initial rainwater;

step four, the initial rainwater after solid-liquid separation flows to the flow dividing device through the water pipe, the opening and closing time T of the electronic valve is calculated according to the precipitation intensity, the rainwater within 15 minutes after precipitation is started is set as the initial rainwater, and the initial rainwater directly flows into the flow discarding chamber from the control port and flows to the rainwater treatment device through the flow discarding port due to the fact that the electronic valve is in an open state between the time T, and step six is carried out; when the calculated value T is reached, the electronic valve is closed, the initial rainwater is collected in the drainage chamber, the floating ball is slowly floated along with the increase of the water level, and the control port is blocked by the floating ball within 16 to 20 minutes;

step five, the initial rainwater is already shunted by the shunt device at this moment, even a little later stage rainwater is mixed, and the next later stage rainwater directly flows into the water collecting tank through the diversion port of the shunt device for subsequent application;

sixthly, enabling part of the initial rainwater passing through the drainage port to flow to a rainwater treatment device for filtration treatment to obtain purified rainwater, and enabling the purified rainwater to flow to a water collecting tank for subsequent application;

and step seven, after the rainfall stops, opening the electronic valve, starting the initial rainwater collected in the drainage chamber to flow to the rainwater treatment device through the drainage port, and executing step six.

The invention has the beneficial effects that: the arrangement is that rainwater collected in the gutter flows into corresponding sewage interception devices and diversion devices at equal intervals with the middle position as a boundary, so that the initial rainwater is collected for a uniform time and is treated; through calculating diverging device's the time of closing the valve, guaranteed the whole collections of initial stage rainwater, centralized processing has solved among the prior art because of having collected too much rainwater and has leaded to the increase of waste water treatment volume, has increased treatment cost's technical problem.

Drawings

Fig. 1 is a partial structure schematic diagram of an initial rainwater collecting and processing system of an industrial factory building.

Fig. 2 is a schematic structural view of the nitrogen removal device of the present invention.

Fig. 3 is a sectional view of the nitrogen removing device in the present invention.

Fig. 4 is a schematic view of the structure of the rotating shaft and the blade in the yoke according to the present invention.

Fig. 5 is a sectional view of the soil interception device of the present invention.

Fig. 6 is a schematic structural view of a sewage interception bar in the sewage interception device of the present invention.

Fig. 7 is a schematic structural diagram of the shunt device in the present invention.

Fig. 8 is a cross-sectional view of a shunt device of the present invention.

FIG. 9 is a schematic view of the rainwater treatment apparatus according to the present invention

Fig. 10 is a sectional view taken along line a-a of the shunt device of the present invention.

Fig. 11 is a sectional view of the flow divider of the present invention taken along line B-B.

Fig. 12 is a sectional view of the check valve in the present invention.

Fig. 13 is a schematic view showing an internal partial structure of the check valve in the present invention.

Each of fig. 1 to 13 is labeled as: the device comprises a roof ditch 1, a drain pipe 2, a sewage interception device 3, a diversion device 4, a rainwater treatment device 5, a sewage interception barrel 301, a water inlet 302, a boss 303, a sewage interception fence 304, a lower collar 305, a connecting plate 306, an upper collar 307, a separation plate 308, a fixing plate 309, a fixing ring 310, a diversion barrel 401, a water inlet 402, a diversion port 403, a drainage port 404, a diversion cover 405, a control port 406, a floating ball 407, a shell 501, an adsorption pipe 502, filter cotton 503, a clamp 601, a water pipe 602, a sealing ring 603, an elastic packing ring 604, a steel wire 605, a limiting wheel 606, a rotating shaft 607, a blade 608, a left connecting pipe 701, a right connecting pipe 702, a containing cavity 703, a claw-shaped placing rack 704, a movable rod spring ring 705, a stop block.

Detailed Description

The invention is further described with reference to the drawings and the detailed description.

The applicant finds out through a plurality of practices and researches that: the pollutants of the rainwater on the ground of the industrial enterprise are different along with different properties of the factory, the components of the pollutants are complex, the types of the pollutants are more, the concentration of partial pollutants is higher, such as COD, ammonia nitrogen, heavy metals and the like, and the environmental quality of the surrounding surface water is easily deteriorated due to improper collection and treatment. However, the collection of rainwater on an industrial surface has problems: an initial rainwater collecting pool can not meet the actual demand, and the runoff time of large rainwater is considered, so that the initial rainwater at a remote place of a plant area is not collected at all and enters the initial rainwater collecting pool, and then the clean rainwater is drained into peripheral water through a rainwater drainage port to cause the pollution of the peripheral water. The initial stage rainwater of fruit etc. in the preceding settlement time in far away reachs initial stage rainwater collecting pit, so in the regional rainwater collection volume of near surpassed settlement time far away, will increase initial stage rainwater pond volume, also increase waste water treatment capacity, and diluted by the clean rainwater in later stage, increase the processing degree of difficulty. Not only increasing the investment cost, but also not achieving the purpose of pollutant collection control, and being unreasonable in technical and economic aspects.

For this purpose, the applicant has made effective improvements in the distribution and collection times from the site of the filtering means and in the means through which the rainwater flows, ensuring the complete collection of the initial rainwater without increasing the work of purification of the initial rainwater, while at the same time collecting very little later rainwater. The rainwater falling before the set precipitation time is the initial rainwater, and the later stage rainwater mentioned here and below is the rainwater falling after the set precipitation time.

The utility model provides a processing system is collected to industry factory building initial stage rainwater, includes: the device comprises a roof ditch 1, a drain pipe 2, a sewage interception device 3, a diversion device 4, a rainwater treatment device 5, a sewage interception barrel 301, a water inlet 302, a boss 303, a sewage interception fence 304, a lower collar 305, a connecting plate 306, an upper collar 307, a separation plate 308, a fixing plate 309, a fixing ring 310, a diversion barrel 401, a water inlet 402, a diversion port 403, a drainage port 404, a diversion cover 405, a control port 406, a floating ball 407, a shell 501, an adsorption pipe 502, filter cotton 503, a clamp 601, a water pipe 602, a sealing ring 603, an elastic packing ring 604, a steel wire 605, a limiting wheel 606, a rotating shaft 607, a blade 608, a left connecting pipe 701, a right connecting pipe 702, a containing cavity 703, a claw-shaped placing rack 704, a movable rod spring ring 705, a stop block.

As shown in fig. 1, a roof groove 1 is arranged at the edge of the roof of the industrial factory building, a plurality of drainage pipes 2 are vertically arranged on the roof of the industrial factory building, the drainage pipes 2 evenly divide the roof groove 1 into a plurality of equal parts, and the drainage pipes 2 are communicated with the roof groove 1 and used for discharging water in the roof groove 1. Cut dirty device 3 and be a plurality of, evenly distributed is in the peripheral department of factory building, diverging device 4 through the water pipe with cut dirty device 3 and be linked together, rainwater processing apparatus 5 through the water pipe with diverging device 4 is linked together, simultaneously cut dirty device 3 through the water pipe rather than adjacent drain pipe 2 connection, rainwater processing apparatus 5 collects same catch basin through the water pipe with the rainwater after handling, diverging device 4 collects later stage rainwater through the water pipe equally in the catch basin. In order to ensure synchronous collection of initial rainwater at all positions of the roof of the factory building at the same time, the middle part of the gutter 1 between the adjacent drainage pipes 2 is higher than the part connected with the drainage pipes 2, the bottom surface of the gutter is obliquely arranged, and the distance from the bottom end of each drainage pipe 2 to the sewage interception device 3 adjacent to the drainage pipe is equal.

Here, if the cross section of this factory building is the square, then day slot 1 is the square, sets up the edge on the roof of factory building, drain pipe 2 is four, respectively vertical the fixing in four apex angle departments of factory building. In order to solve the cost, it is two to cut dirty device 3, is the mirror image setting and is in the both sides of factory building, and with the bottom and the same route of cutting two drain pipes 2 that dirty device 3 is adjacent communicate in cutting dirty device 3 to all routes have been guaranteed and have all communicated with each other.

Or, when the cross section of the plant is circular, the overall structure of the roof gutter 1 is circular and is arranged at the edge of the roof of the plant, and the number of the drainage pipes 2 can be one or even. When the drain pipe 2 is one, that is, the middle portion of the gutter 1 is located opposite to the drain pipe 2, the sewage interception means 3 may be one.

When the number of the drainage pipes 2 is two, the two drainage pipes 2 are distributed in a mirror image mode with the center of a plant, at the moment, the middle part of the gutter 1 is positioned at one half of the gutter 1 between the two drainage pipes 2, and the sewage interception device 3 can be one or two and is arranged on a symmetrical line where the two drainage pipes 2 are positioned.

Because of there can be nitrogen pollution source in the earth's surface department of factory building, so set up the nitrogen removal device in drain pipe 2, this nitrogen removal device includes: a clamp 601, a water pipe 602, a sealing ring 603, an elastic packing ring 604, a steel wire 605, a limiting wheel 606, a rotating shaft 607 and a blade 608.

As shown in fig. 2 to fig. 3, the clip 601 is used for connecting with the drain pipe 2, and a connection method commonly used in the art is adopted, so that the description is omitted. The water service pipe 602 and the bottom end of the clamp 601 are integrally formed, and the sealing ring 310 is fixedly sleeved on the water service pipe 602, and can also be integrally formed and used for being in sealing connection with the drain pipe 2 below the nitrogen removal device. The elastic packing ring 604 is drivingly connected between the water pipe 602 and the water discharge pipe 2. The nitrogen removal device filters nitrogen mixed in initial rainwater, fully utilizes the space of the drain pipe 2, is connected between the drain pipes 2 through the clamping band 601, is convenient to mount and dismount, carries out regular maintenance and repair, and exchanges the elastic packing ring 604 when necessary.

Because of elastic packing circle 604 is applicable to the nitrogen that adsorbs the rainwater, and can be soaked by the rainwater and can take place certain inflation for a long time when raining, if there is not certain elasticity space, the lower extreme of elastic packing circle 604 then can extrude drain pipe 2, causes the damage.

Therefore, the elastic packing ring 604 comprises a plurality of elastic packing strips, the upper end and the lower end of each elastic packing strip gradually extend towards the drain pipe 2 and are in contact with the drain pipe 2, and a gap is reserved between the middle position of each elastic packing strip and the drain pipe 2 and used for expanding the elastic packing ring 604. The upper and lower ends of the adjacent elastic filler strips are respectively connected in series through steel wires 605 to form a cylinder shape; meanwhile, the middle positions of the elastic filler strips are flush with the inner walls of the water service pipes 602, so that rainwater can be directly contacted with the elastic filler strips, the contact area between the rainwater and the elastic filler strips is increased, and the nitrogen filtration is improved.

However, the upper end of the elastic packing strip is simultaneously confined between the water pipe 602 and the drain pipe 2, and after being soaked for a long time, the water pipe 602 and the drain pipe 2 are simultaneously pressed.

So the elastic filler strip is in transmission connection with the drain pipe 2 through a sliding assembly, the sliding assembly comprises: a limiting wheel 606 movably embedded in the outer wall of the elastic filler strip, and a limiting groove formed in the inner wall of the drain pipe 2; the limiting wheel 606 is located in the corresponding limiting groove. The elastic filler strip has a certain sliding function in the limited length of the limiting groove, so that the elastic filler strip can automatically adjust the position after being adsorbed to a certain degree or even after being saturated, and can move downwards to reduce the contact area with the water service pipe 602, thereby reducing the extrusion on the drain pipe 2.

When the nitrogen removal device is installed, the water pipe 602 is connected with the drain pipe 2 located above the water pipe through the clamp 601, the elastic packing ring 604 is installed at the top end of the limiting groove of the drain pipe 2, then the bottom end of the water pipe is inserted into the elastic packing ring 604, and then the drain pipe 2 located below is fixedly connected with the fixing ring 310.

In the nitrogen removing structure, with reference to the drawings, the diameter of the water pipe 602 is smaller than the inner diameter of the clamp 601, and solid objects such as leaves and waste paper inevitably exist on the roof of a factory building, in order to avoid the phenomenon of blockage, a rotating shaft 607 is mounted at the radial position of the bottom end of the clamp 601 through a bearing, a plurality of blades 608 are fixedly mounted on the rotating shaft 607 along the axial direction thereof, and the edge portions of the blades 608 are located in the water pipe 602. The blades 608 are used to break up solid impurities and prevent the solid matter from clogging the channels.

However, if there is a large gap between the edge of the blade 608 and the clamp 601, solid matter is caught between the blade 608 and the clamp 601, and particularly in the case of low precipitation intensity, rainwater cannot drive the blade 608 to rotate and block, which inevitably directly causes hysteresis in collecting initial rainwater. Therefore, as shown in fig. 4, the blade 608 is semi-circular and has a radius slightly smaller than that of the housing 601, so that when the solid matter falls down to the housing 601, the solid matter does not directly block between the blade 608 and the housing 601, but falls between adjacent blades 608, and the blades 608 are driven to rotate to drive the solid matter downward by combining the weight of the solid matter and the action of the water flow. If solid material becomes stuck at the connection between the clip 601 and the water pipe 602, the blade 608 will then act to crush the solid material. Meanwhile, in the rotating process of the blade 608, rainwater at the position of the overflowing hoop 601 is lifted, the rainwater is forced to slide down along the inner wall of the elastic packing ring 604, and the rainwater purification effect of the elastic packing ring 604 is increased.

In the above structure, when the blade 608 only drives the solid matter, the solid matter is not cleaned, and therefore, the dirt intercepting device 3 includes: the sewage interception device comprises a sewage interception barrel 301, a water inlet 302 arranged at the top of the sewage interception barrel 301, a discharge outlet arranged at the bottom of the sewage interception barrel 301, a boss 303 arranged on the inner wall of the sewage interception barrel 301 and flush with the water inlet 302, and a sewage interception fence 304 movably connected to the boss 303 and positioned in the sewage interception barrel 301.

As shown in fig. 5 and 6, the trash rack 304 includes: a lower collar 305 placed on the boss 303, a plurality of connection plates 306 vertically fixed at the edge of the lower collar 305, an upper collar 307 fixedly connected to the top of the connection plates 306, a plurality of separation plates 308 fixed at the inner wall of the lower collar 305 and extending downward through the boss 303, a fixing plate 309 fixed at the bottom of the separation plate 308, and fixing rings 310 equidistantly arranged at the outer side of the separation plate 308;

the distance between the adjacent connecting plates 306 is far greater than that between the adjacent separating plates 308, the connecting plates 306 and the separating plates 308 are fixed along the radial direction of the circle in which the connecting plates 306 and the separating plates 308 are located, and the separating plates 308 are used for intercepting crushed debris.

In order to realize the regular cleaning of the sewage interception device 3, an end cover is arranged above the sewage interception barrel 301, when the sewage interception device needs to be cleaned, the end cover is only required to be lifted, and the sewage interception fence 304 can be taken out manually or through a mechanical arm conveniently.

Then, the initial rainwater and the later rainwater are effectively separated: and the flow dividing device 4 is communicated with the sewage interception device 3. As shown in fig. 7 to 8, the flow dividing device 4 includes: the flow dividing device comprises a flow dividing barrel 401, a water inlet 402 arranged at one side of the top end of the flow dividing barrel 401, a flow guide opening 403 arranged at the other side of the top end of the flow dividing barrel 401, a flow abandoning opening 404 arranged at the bottom of the flow dividing barrel 401, a flow dividing cover 405 fixed at the inner wall of the flow dividing barrel 401, a control opening 406 arranged at the middle position of the flow dividing cover 405, a floating ball 407 placed below the flow dividing cover 405, and an electronic valve arranged at the flow abandoning opening 404; when the floating ball 407 is jacked up, the control port 406 can be just sealed. The electronic valve and its control are prior art used in the conventional waste stream device in this field, and therefore they are not described in detail. Carry out effectual separation to initial stage rainwater and later stage rainwater, effectual control prevents to collect too much rainwater to the collection of initial stage rainwater, leads to the handling capacity increase.

If the vertical section of the flow dividing cover 405 is a straight line, the floating ball 407 is difficult to accurately drift into the control port 406, and the omission of initial rainwater collection is caused, so that the flow dividing cover 405 is of a conical structure and plays a role in guiding the floating ball 407, the floating ball 407 directly drifts to the control port 406 of the flow dividing cover 405, and a sealing ring is fixed below the edge of a control hole on the sealing cover; the flow dividing cover 405 divides the flow dividing cylinder 401 into a flow guide chamber and a flow abandoning chamber located below the flow guide chamber.

Meanwhile, the time for closing the electronic valve is calculated according to the precipitation intensity and the water flow speed: t: the height of the diversion cover 405 is h, half of the length, width and height of the flow abandoning chamber are R, the rainwater overflow quantity at the control port 406 is S, the volume of the floating ball 407 is ignored here, the time for closing the electronic valve is later shifted, the diversion cover has the effect of avoiding inundation,

then T ═ T (1/3 π R ^2h +8R ^3+1/6 π h ^3)/S + T1;

wherein, the overflow amount S is S section × v, S section is the cross-sectional area of the control port 406, v is the flow velocity of the rainwater, and t1 is the time when the rainwater at the middle position of the gutter 1 reaches the control port 406 in the diversion device 4;

v is qF psi, wherein F is catchment area, psi is runoff coefficient;

q is the rainstorm intensity, p is the recurrence period, At is the rainfall parameter, C is the rainfall variation parameter, b is the rainfall duration correction parameter, n is the rainstorm attenuation index, and t is the rainfall time of the initial rainwater. The time for closing the electronic valve is effectively calculated, and the initial rainwater is completely collected and a small amount of later rainwater is collected.

After the diversion, the initial rainwater is purified again to remove COD, heavy metals and the like. The rainwater treatment apparatus 5 as shown in fig. 9 to 11 includes: the water inlet structure comprises a shell 501 transversely placed, a water inlet 402 arranged at one end of the shell 501 and a water outlet arranged at the other end of the shell 501; the shell 501 near one end of the water inlet 402 is a solid structure, and the shell 501 near one end of the water outlet is a hollow structure.

A plurality of adsorption tubes 502 are transversely inserted into the solid structure, one end of each adsorption tube 502 is communicated with the water inlet 402, the other end of each adsorption tube 502 is communicated with the hollow structure, and the adsorption tubes 502 are made of manganese sand or anthracite; set up the effect that a plurality of adsorption tube 502 played the reposition of redundant personnel to the rainwater here, increased the area of contact of adsorption tube 502 with the rainwater, improve the adsorption efficiency. The rainwater treatment device 5 further includes: and the filter cotton 503 is vertically fixed in the hollow structure.

However, since the rainwater treatment device 5 is communicated with the diversion device 4 by the adsorption pipes 502, the initial rainwater is directly diverted after entering the rainwater treatment device 5, and the cross section of the adsorption pipes 502 is reduced and the total flow rate is reduced, so that the backflow phenomenon is easily caused, if the backflow phenomenon is generated at the position when the electronic valve is about to be closed, the backflow rainwater returns to the drainage chamber again, partial volume in the drainage chamber is occupied, incomplete collection of the initial rainwater is directly caused, the initial rainwater which is not collected flows to the water collection tank directly at the later stage, and therefore the flow stop valve is arranged in front of the rainwater treatment device 5 to prevent the rainwater from flowing backwards.

As shown in fig. 12 to 13, the check valve includes: the water pipe is connected with the left connecting pipe 701 of the flow abandoning port 404, the right connecting pipe 702 is communicated with the water inlet 402 of the shell 501 and is tightly connected with the left connecting pipe 701, the containing cavity 703 is arranged at the left end of the right connecting pipe 702, the claw-shaped placing frame 704 is fixed at the inner wall of the right end of the containing cavity 703, the movable rod 705 movably inserted in the claw-shaped placing frame 704, the stop block 706 is fixed at the left end of the movable rod 705, and the tapered spring ring 707 is sleeved outside the claw-shaped placing frame 704 and is fixedly connected with the stop block 706; when the tapered spring ring 707 is not subjected to any external force, the stop block 706 abuts against the left connecting pipe 701.

When rainwater flows from the left connecting pipe 701 to the right connecting pipe 702, water flow pushes the stopper 706, so that the stopper 706 moves to the right through the tapered spring ring 707 and the movable rod 705, the stopper 706 is not in contact with the left connecting pipe 701, and rainwater flows normally; on the contrary, when rainwater flows from the right connection pipe 702 to the left connection pipe 701, the water flow also has a pushing effect on the stopper 706, the stopper 706 is pushed to approach the left connection pipe 701, the left connection pipe 701 is directly blocked, the water flow cannot move left continuously, and the reverse flow is prevented.

Claims

1. A system for collecting and treating initial rainwater of an industrial factory building is characterized in that,

the method comprises the following steps: the drainage system comprises a gutter channel arranged at the edge of a roof of a factory building, a plurality of drainage pipes which are communicated with the gutter channel and divide the gutter channel into a plurality of equal parts and are vertically arranged, a plurality of sewage interception devices which are uniformly distributed at the periphery of the factory building, a flow dividing device communicated with the sewage interception devices through water pipes, and a rainwater treatment device communicated with the flow dividing device through water pipes;

the middle part of the gutter between the adjacent drain pipes is higher than the part connected with the drain pipes, the bottom surface of the gutter is obliquely arranged, and the distance from the bottom end of each drain pipe to the adjacent sewage interception device is equal;

the intermediate position of drain pipe is provided with the nitrogen removal device, the nitrogen removal device includes: the water pipe is fixedly sleeved on the water pipe and fixedly connected with the drain pipe, and the elastic packing ring is in transmission connection between the water pipe and the drain pipe;

the elastic packing ring comprises a plurality of elastic packing strips, the upper ends and the lower ends of the elastic packing strips gradually extend towards the drain pipe and are in contact with the drain pipe, a gap is reserved between the middle position of each elastic packing strip and the drain pipe, and the upper ends and the lower ends of the adjacent elastic packing strips are respectively connected in series through steel wires to form a cylinder shape;

elastic packing strip and drain pipe between be connected through the slip subassembly transmission, the slip subassembly includes: the limiting wheel is movably embedded in the outer wall of the elastic filler strip, and the limiting groove is formed in the inner wall of the drainage pipe; the limiting wheel is positioned in the corresponding limiting groove, so that the elastic packing ring can move in the limiting groove automatically.

2. The system of claim 1, wherein the clamp comprises: the water pipe cutting device comprises a rotating shaft and a plurality of blades, wherein the rotating shaft is installed at the radial position of the bottom end of the hoop through a bearing, the blades are fixedly installed along the axial direction of the rotating shaft, the blades are semicircular, and the edge parts of the blades are located in a water pipe;

the blade is used for smashing solid impurity, is used for raising the rainwater of class clamp department simultaneously, forces the rainwater to slide down along the inner wall of elastic packing circle, increases the purification effect of elastic packing circle to the rainwater.

3. The system for collecting and treating initial rainwater of industrial factory building according to claim 1, wherein said intercepting device comprises: the sewage interception device comprises a sewage interception barrel, a water inlet arranged at the top of the sewage interception barrel, a discharge port arranged at the bottom of the sewage interception barrel, a boss which is arranged on the inner wall of the sewage interception barrel and is flush with the water inlet, and a sewage interception fence which is movably connected with the boss and is positioned in the sewage interception barrel.

4. The system of claim 3, wherein the dirt-intercepting fence comprises: the clamping device comprises a lower clamping ring placed on the boss, a plurality of connecting plates vertically fixed at the edge of the lower clamping ring, an upper clamping ring fixedly connected to the top of each connecting plate, a plurality of partition plates fixed at the inner wall of the lower clamping ring and penetrating through the boss to extend downwards, a fixing plate fixed at the bottom of each partition plate, and fixing rings which are circled at the outer sides of the partition plates at equal intervals;

the distance between the adjacent connecting plates is larger than that between the adjacent partition plates, the connecting plates and the partition plates are fixed along the radial direction of the circle where the connecting plates and the partition plates are located, and the partition plates are used for intercepting crushed debris.

5. The system of claim 1, wherein the diversion device comprises: the water inlet is arranged on one side of the top end of the shunting barrel, the flow guide port is arranged on the other side of the top end of the shunting barrel, the flow discarding port is arranged at the bottom of the shunting barrel, the shunting cover is fixed on the inner wall of the shunting barrel, the control port is arranged in the middle of the shunting cover, the floating ball is placed below the shunting cover, and the electronic valve is arranged at the flow discarding port; when the floating ball is jacked up, the control port can be just sealed.

6. The system for collecting and treating initial rainwater of the industrial factory building according to claim 5, wherein the flow distribution cover is of a conical structure, and a sealing ring is fixed below the edge of the control opening on the flow distribution cover; the flow dividing cylinder is divided into a flow guiding chamber and a flow abandoning chamber positioned below the flow guiding chamber by the flow dividing cover;

then

v is qF psi, wherein F is catchment area, psi is runoff coefficient;

q is the intensity of the rainstorm, p is the period of recurrence, A_tThe rainfall parameter is a rainfall parameter, C is a rainfall variation parameter, b is a rainfall duration correction parameter, n is a rainstorm attenuation index, and t is the rainfall time of initial rainwater.

7. The system of claim 1, wherein the rainwater treatment device comprises: the water inlet is arranged at one end of the shell, and the water outlet is arranged at the other end of the shell; the shell close to one end of the water inlet is of a solid structure, and the shell close to one end of the water outlet is of a hollow structure;

the rainwater treatment device further comprises: the adsorption pipes are transversely inserted into the solid structure in a penetrating mode, one ends of the adsorption pipes are communicated with the water inlet, the other ends of the adsorption pipes are communicated with the hollow structure, and the adsorption pipes are made of manganese sand or anthracite;

8. The system for collecting and treating initial rainwater of industrial factory building according to claim 7, wherein a flow stopping valve is arranged between the flow abandoning port of the flow dividing device and the water inlet of the housing of the rainwater treatment device, and the flow stopping valve comprises: the water pipe is connected with the left connecting pipe of the flow abandoning port, the right connecting pipe is communicated with the water inlet of the shell and is tightly connected with the left connecting pipe, the containing cavity is arranged at the left end of the right connecting pipe, the claw-shaped placing frame is fixed at the inner wall of the right end of the containing cavity, the movable rod is movably inserted in the claw-shaped placing frame, the stop block is fixed at the left end of the movable rod, and the conical spring ring is sleeved outside the claw-shaped placing frame and is fixedly connected with the stop block;

when the conical spring ring is free from any external force, the stop block is abutted against the left connecting pipe.

9. The collection and treatment method of the initial rainwater collection and treatment system for the industrial factory building according to any one of claims 1 to 8, is characterized by comprising the following steps: