CN104060675B - The equal permanent water level exhaust system of municipal wastewater collecting well and discharge method thereof - Google Patents

The equal permanent water level exhaust system of municipal wastewater collecting well and discharge method thereof Download PDF

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Publication number
CN104060675B
CN104060675B CN201310091903.0A CN201310091903A CN104060675B CN 104060675 B CN104060675 B CN 104060675B CN 201310091903 A CN201310091903 A CN 201310091903A CN 104060675 B CN104060675 B CN 104060675B
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China
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drainage pump
municipal wastewater
water level
collecting well
wastewater collecting
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CN104060675A (en
Inventor
李建勇
杨伟忠
陈志伟
沈振亮
龚磊
胡盛梁
冯晓卿
茅璐云
何敏
陈吉明
宣建岚
朱灵
顾士杰
黄怡
沈宁
孔利明
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SHANGHAI CITY MUNICIPAL DRAINAGE CO Ltd
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SHANGHAI CITY MUNICIPAL DRAINAGE CO Ltd
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Abstract

The present invention discloses the equal permanent water level exhaust system of a kind of municipal wastewater collecting well, and comprise: municipal wastewater collecting well, top is provided with upper limit level sensor and lower limit level sensor; Waste water tunnel, it connects municipal wastewater collecting well; Drainage pump, its water inlet connects waste water tunnel; Water pushing pressure well, it is connected with drainage pump; Send aquaporin, water inlet is connected to water pushing pressure well; High-order wet well, it connects the delivery port sending aquaporin; High-order wet well delivery port by sewage transport to treatment tank; Control module and drainage pump motor, the waste water level that control module reception upper limit level sensor and lower limit level sensor detect, carries out variable frequency control according to waste water level to drainage pump motor, controls the drain discharge of drainage pump.The present invention, by variable frequency control drainage pump, makes drainage pumping plant waste water collecting well stable level in a range of set value, avoids the phenomenon that waste water collecting well water level rises and fall sharply and quickly and drainage pump motor starts again and again.

Description

The equal permanent water level exhaust system of municipal wastewater collecting well and discharge method thereof
Technical field
The present invention relates to a kind of municipal wastewater technology, be specifically related to the equal permanent water level exhaust system of a kind of municipal wastewater collecting well and discharge method thereof.
Background technology
Urban sewerage and drainage system, be process and the system facility getting rid of the various waste water in city, being the important component part of urban public utilities, is the important system of modern city safety and environmental protection.China's rapid economic development in decades, accelerates the expansion of rural urbanization and urban architecture; The developing rapidly of China's urban architecture and realty industry from the beginning of this century, also promotes the construction of urban sewerage and drainage facility, China's urban sewerage and drainage ability is strengthened widely.Check the drainability in a city, not still can in time by the sewage in whole city and rainwater fast unobstructed excrete out, handle sewage well, protect environment, possess reply burst weather event ability; Also must embody the ability of low-carbon energy-saving.
Modern city draining be unable to do without drainage pump, and drainage pump is all furnished with heavy-duty motor and drives, and the every platform of heavy-duty motor of general urban sewerage and drainage pump is all at 260KW(kilowatt) more than; And Urban Drainage Pumping Stations has several with the configuration of Water pumping installation unit (a certain pumping plant of such as Pudong just has 8 urban sewerage and drainage pumps, and every platform drainage pump motor is at more than 300KW, and overall distribution capacity reaches 3000KW); Can say that each Urban Drainage Pumping Stations is all energy consumption rich and influential family, thus the drainage pumping plant that city is numerous is rationally run, low-carbon energy-saving, the whole urban distribution network of guarantee stable, it is crucial for making the drainage pump of each City Pumping Station plan as a whole operation.According to the operation logic of motor, when starting running by inactive state, 2-7 times when its energy consumption is normal operation, as multiple stage starts the voltage drop that more can cause whole power supply network simultaneously, so namely frequent starting urban sewerage and drainage pump wastes energy, the instability of power supply network can be caused again; Frequent starting urban sewerage and drainage pump, also can cause larger loss to pump housing equipment and motor simultaneously, and the frequent starting reducing heavy-duty motor is thus stable power-supplying net and the Main Means saving electric energy.
Take a broad view of existing Urban Drainage Pumping Stations technology, be all generally obtain water level information by municipal wastewater collecting well, by level sensor starter motor driver, then start pump motor by motor driver; When the water level in municipal wastewater collecting well is reduced to control line, level sensor is disable motor driver again, and then switch off the pump motor; When municipal wastewater collecting well water level rises again, then by level sensor deactivation motor driver, start pump motor successively, so frequent motor starts again and again repeatedly, causes energy consumption and strengthens, equipment damage.Due to the upper bottom fluctuation of municipal wastewater collecting well, also cause the flow fluctuation of municipal sewage system, the inertial fluctuation of sewer comes together in the waste water collecting well of drainage pumping plant, more cause the water-level fluctuation in collecting well, water-level fluctuation in this collecting well goes to remove triggered discharge pump motor continually again, makes drainage pump electric motor starting frequently, and vicious circle causes equipment frequently impaired, energy consumption remains high, and power supply network again and again " tripping operation ".
Summary of the invention
The invention provides the equal permanent water level exhaust system of a kind of municipal wastewater collecting well and discharge method thereof, by the method for equal permanent draining, avoid the frequent startup of pump motor.
For achieving the above object, the invention provides the equal permanent water level exhaust system of a kind of municipal wastewater collecting well, be characterized in, this system comprises:
Municipal wastewater collecting well, its lower sidewall is provided with municipal wastewater water inlet, and municipal wastewater enters municipal wastewater collecting well by municipal wastewater water inlet; Municipal wastewater collecting well top is provided with upper limit level sensor and lower limit level sensor;
Waste water tunnel, it is connected to the lower sidewall of municipal wastewater collecting well;
Drainage pump, its drainage pump water inlet connects waste water tunnel top;
Water pushing pressure well, it is connected with drainage pump, and drainage pump delivery port is communicated to the sidewall bottom of water pushing pressure well;
Send aquaporin, its water inlet is connected to water pushing pressure well by sidepiece;
High-order wet well, it connects the delivery port sending aquaporin, is communicated with water pushing pressure well by sending aquaporin;
High-order wet well delivery port, it is arranged at the side wall upper part of high-order wet well, and municipal sewage is delivered to follow-up treatment tank;
Control module and drainage pump motor, waste water level in the municipal wastewater collecting well that control module reception upper limit level sensor and lower limit level sensor detect, and according to the waste water level in municipal wastewater collecting well, variable frequency control is carried out to drainage pump motor, thus control the drain discharge of drainage pump;
When in municipal wastewater collecting well, waste water level reaches upper limit, then drainage pump motor speed is accelerated, and improves drainage pump flow;
When in municipal wastewater collecting well, waste water level reaches lower limit, then drainage pump motor speed slows down, and reduces drainage pump flow.
The drainage pump unit of normality drainage pump unit and adjustable speed is comprised in above-mentioned drainage pump motor; The drainage pump unit of more than one or one adjustable speed is provided with in drainage pump motor.
Above-mentioned control module comprises:
PLC, the waste water level that its reception upper limit level sensor and lower limit level sensor detect, and export corresponding control instruction according to waste water level;
Frequency-variable controller, it receives the control instruction that PLC exports, and controls the drain discharge that drainage pump motor regulates drainage pump.
Above-mentioned drainage pump water outlet is provided with drainage pump unidirectional cutoff door.
The top of above-mentioned water pushing pressure well is provided with water pushing pressure well servicing mouth, and when the equal permanent water level exhaust system of municipal wastewater collecting well is shut down anhydrous, personnel enter system maintenance maintenance by this water pushing pressure well servicing mouth.
A discharge method for the equal permanent water level exhaust system of municipal wastewater collecting well described above, be characterized in, the method includes the steps of:
Step 1, control module control drainage pump and drainage pump electric motor starting;
Step 2, upper limit level sensor and lower limit level sensor detect the waste water level in municipal wastewater collecting well, and transfer to control module;
Step 3, control module judge that in municipal wastewater collecting well, whether waste water level situation transfinites, and if not, then jumps to step 4, if so, then jumps to step 8;
Step 4, control module judge that whether water level is close to the upper limit, if so, then jumps to step 5, if not, then jump to step 6;
Step 5, control module accelerate drainage pump rotating speed by drainage pump motor, thus reduce water level in municipal wastewater collecting well, and jump to step 11;
Step 5.1, PLC control normality drainage pump unit and normally work;
Step 5.2, PLC export upper limit drive singal to frequency-variable controller;
The drainage pump unit that step 5.3, frequency-variable controller control adjustable speed accelerates to drive drainage pump draining, and water level in municipal wastewater collecting well is reduced;
Step 6, control module receive lower limit level sensor detection information, and judge that whether water level is close to lower limit, if so, then jumps to step 7, if not, then jump to step 4;
Step 7, control module reduce drainage pump rotating speed by drainage pump motor, thus improve water level in municipal wastewater collecting well, and jump to step 11;
Step 7.1, PLC bottoming drive singal are to frequency-variable controller;
Step 7.2, frequency-variable controller control the drainage pump unit deceleration drainage pump draining of adjustable speed, make water level in municipal wastewater collecting well increase;
Step 8, control module judge that water level is the super upper limit or super lower limit, if the super upper limit, then jump to step 9, if super lower limit, then jump to step 10;
Step 9, control module start the measure of super upper limit emergent management, jump to step 11 after completing;
Step 9.1, PLC send super upper limit alarm;
Step 9.2, operator on duty meet an urgent need and manually start redundant sump pump unit, and municipal wastewater collecting well water level is reduced;
Step 10, control module start the measure of super lower limit emergent management, jump to step 11 after completing;
Step 10.1, PLC send super lower limit alarm;
Step 10.2, the emergent artificial closedown normality drainage pump unit of operator on duty, by the drainage pump machine isolated operation of adjustable speed;
The equal permanent water level exhaust system of step 11, municipal wastewater collecting well maintains controlling water level, and jumps to step 2.
The equal permanent water level exhaust system of municipal wastewater collecting well of the present invention and discharge method thereof are compared with the municipal wastewater draining technology of prior art, its advantage is, the present invention is by variable frequency control drainage pump, thus make drainage pumping plant waste water collecting well stable level in a range of set value, avoid the phenomenon of waste water collecting well water level big rise and big fall, eliminate the sewer inertia caused because of the big rise and big fall of collecting well water level and " spring up ".Due to waste water collecting well stable level, avoid drainage pump motor and again and again start phenomenon, equipment availability has risen to 94%, and original only 55%.After the invention process, power supply network is highly stable, and energy-saving effect is obvious especially, owing to eliminating the energy consumption that drainage pump motor starts again and again, saves electric energy more than 20% than original technology pumping plant.
Accompanying drawing explanation
Fig. 1 is the structural representation of the equal permanent water level exhaust system of municipal wastewater collecting well of the present invention;
Fig. 2 is the fundamental diagram of the equal permanent water level exhaust system of municipal wastewater collecting well of the present invention;
Fig. 3 is the flow chart of the discharge method of the equal permanent water level exhaust system of municipal wastewater collecting well of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, further illustrate specific embodiments of the invention.
As shown in Figure 1, the embodiment of the equal permanent water level exhaust system of a kind of municipal wastewater collecting well is disclosed.The equal permanent water level exhaust system of this municipal wastewater collecting well has municipal wastewater collecting well 16, waste water tunnel 18, drainage pump 20, water pushing pressure well 23, send aquaporin 25, high-order wet well 09 on ground 11.
Wherein municipal wastewater collecting well 16, waste water tunnel 18, drainage pump 20, water pushing pressure well 23, send aquaporin 25, high-order wet well 09 all adopts mixed territory structure 13,14.At municipal wastewater collecting well 16, waste water tunnel 18, drainage pump 20, water pushing pressure well 23, send around aquaporin 25, high-order wet well 09 and be equipped with underground landfill material 26, the such as earthwork.
Municipal wastewater collecting well 16 lower sidewall is provided with municipal wastewater water inlet 15, and municipal wastewater enters municipal wastewater collecting well 16 by municipal wastewater water inlet 15.Municipal wastewater collecting well 16 open top is equal with ground 11, higher than sea level 12, upper limit level sensor 02 and lower limit level sensor 03 is provided with, respectively with upper limit water level and the lower limit water level of waste water level in detection municipal wastewater collecting well 16 at municipal wastewater collecting well 16 top.
Waste water tunnel 18 is connected to the lower sidewall of municipal wastewater collecting well 16, and extends to adjacent with water pushing pressure well 23.Waste water tunnel 18 is arranged at sea level less than 12.
Water pushing pressure well 23 is arranged on ground 11 times; its top and ground 11 intersection are provided with water pushing pressure well servicing mouth 24; when the equal permanent water level exhaust system of municipal wastewater collecting well is shut down anhydrous, personnel enter system maintenance maintenance by this water pushing pressure well servicing mouth 24.
Drainage pump 20 be arranged on one be arranged in ground 11 under draining pump house 17, this draining pump house 17 kinds is provided with drainage pump 20 inspected by the stair that can lead to ground duty for staff.Its drainage pump water inlet 15 connects the top of waste water tunnel 18, drainage pump delivery port 21 is communicated to the sidewall bottom of water pushing pressure well 23, municipal wastewater in municipal wastewater collecting well 16 flow to waste water tunnel 18, by drainage pump 20, the waste water in waste water tunnel 18 is drained into water pushing pressure well 23.Drainage pump unidirectional cutoff door 22 is also provided with, to prevent return of waste water at drainage pump delivery port 21 place.
Aquaporin 25 water inlet is sent to be connected to the side of water pushing pressure well 23 by sidepiece.Aquaporin 25 is sent to be positioned at b.s.l..
High-order wet well 09 connects the delivery port sending aquaporin 25, by sending aquaporin 25 thus being communicated with water pushing pressure well 23.
The top of high-order wet well 09 is above the ground level 11, its high-order wet well delivery port 10 is arranged at the side wall upper part of described high-order wet well 09, for municipal sewage is delivered to follow-up treatment tank, this treatment tank can be the biological bacterium treatment pond of Wastewater Treatment Plant.
The equal permanent water level exhaust system of municipal wastewater collecting well is on ground 11, and the adjacent municipal wastewater that is provided with catchments well house 01, control room 04, drainage pump motor house 05, switchgear house 07 successively.
The municipal wastewater well house 01 that catchments is arranged on municipal wastewater collecting well 16.
Drainage pump motor 06 is provided with in drainage pump motor house 05, drainage pump motor 06 connects drainage pump 20, comprise the drainage pump unit of normality drainage pump unit and adjustable speed in drainage pump motor 06, wherein in drainage pump motor 06, be provided with the drainage pump unit of more than one or one adjustable speed.The drainage pump unit of adjustable speed is used for carrying out variable frequency control to drainage pump 20, thus controls the drain discharge of drainage pump 20.
Control module is provided with in control room 04, control module comprises programmable logic controller (PLC) (PLC, ProgrammableLogicController) controller and frequency-variable controller, the model that in the present embodiment, frequency-variable controller adopts Shanghai Wen Jun automation scientific & technical corporation to manufacture is HC1-P.PLC connects the output of upper limit level sensor 02 and lower limit level sensor 03, and frequency-variable controller input.PLC for waste water level in the municipal wastewater collecting well 16 that receives upper limit level sensor 02 and lower limit level sensor 03 and detect, and exports corresponding control instruction according to waste water level.The control instruction that frequency-variable controller exports for receiving PLC, controls the drain discharge that drainage pump motor 06 regulates drainage pump 20.When in municipal wastewater collecting well 16, waste water level reaches upper limit, then drainage pump motor 06 faster rotational speed, improves drainage pump 20 flow; When in municipal wastewater collecting well 16, waste water level reaches lower limit, then drainage pump motor 06 spin down, reduces drainage pump 20 flow.
Power supply is provided with, for providing electric energy respectively to control module, drainage pump motor 06 and drainage pump 20 in switchgear house 07.
The equal permanent water level exhaust system of this municipal wastewater collecting well also includes redundant sump pump unit, because manpower intervention controls, for the emergency processing state of emergency
As shown in Figure 2, the operating principle of the equal permanent water level exhaust system of municipal wastewater collecting well of the present invention is as follows: when the present invention starts pumping plant, water level is detected by the upper limit level sensor 02 above municipal wastewater collecting well 16 and lower limit level sensor 03, after water level information reaches control room, start two kinds of pump motors immediately: the first is normality drainage pump unit, such pump motor only does the running of normality average rate, current-sharing draining, needs to open several by manually setting according to actual displacement; The second water pump is the drainage pump unit of adjustable speed, the displacement of such drainage pump is by the data of level sensor, through the driving of PLC, the rotating speed of the motor of water pump is regulated and controled by frequency-variable controller, when the water level of municipal wastewater collecting well 16 is at upper limit, drainage pump motor 06 is with regard to faster rotational speed, and drainage pump 20 flow is just large; Otherwise when the water level of municipal wastewater collecting well 16 is in lower limit, drainage pump motor 06 is with regard to spin down, and drainage pump 20 flow is just little.The rotating speed of drainage pump motor 06 can be adjusted to minimum by frequency-variable controller of the present invention (Shanghai Wen Jun automation scientific & technical corporation manufactures, model: HC1-P) automatically.The effect of the drainage pump of adjustable speed is the normality drainage pump unit bypass current-sharing regulating action serving whole drainage pumping plant in fact, thus the water level of waste water collecting well is controlled all the time in the scope allowing lifting.
When running into the situation such as municipal water pipe explosion or meteorological burst, the present invention can also start urgent provision: namely manually start redundant sump pump unit; The grid-connected of redundant sump pump unit is enabled, and can make the double increase of drainability, impels municipal wastewater collecting well 16 water level rezime to setting value.
As shown in Figure 3, the present invention also discloses the discharge method of the equal permanent water level exhaust system of a kind of municipal wastewater collecting well, and the method includes the steps of:
Step 1, control module control drainage pump 20 and drainage pump motor 06 starts.
Step 2, upper limit level sensor 02 and lower limit level sensor 03 detect the waste water level in municipal wastewater collecting well 16, and transfer to control module.Water level information of the present invention is divided into upper limit and lower limit, and controlled water level settings is between upper limit and lower limit; The distance of upper limit and lower limit is nearer, and control accuracy is higher; Control accuracy of the present invention can reach 2 cm, potential difference precision like this, just inertia can never be caused " to spring up " to sewer.
Step 3, control module judge that in municipal wastewater collecting well 16, whether waste water level situation transfinites, and if not, then jumps to step 4, if so, then jumps to step 8.
Step 4, control module judge that whether water level is close to the upper limit, if so, then jumps to step 5, if not, then jump to step 6.
Step 5, control module accelerate drainage pump 20 rotating speed by drainage pump motor 06, thus reduce water level in municipal wastewater collecting well 16, and jump to step 11.
Step 5 comprises following steps:
Step 5.1, PLC control normality drainage pump unit and normally work.
Step 5.2, PLC export upper limit drive singal to frequency-variable controller.
The drainage pump unit that step 5.3, frequency-variable controller control adjustable speed accelerates to drive drainage pump 20 draining, and water level in municipal wastewater collecting well 16 is reduced.
Step 6, control module receive lower limit level sensor 03 detection information, and judge that whether water level is close to lower limit, if so, then jumps to step 7, if not, then jump to step 4.
Step 7, control module reduce drainage pump 20 rotating speed by drainage pump motor 06, thus improve water level in municipal wastewater collecting well 16, and jump to step 11.
Step 7 comprises following steps:
Step 7.1, PLC bottoming drive singal are to frequency-variable controller.
Step 7.2, frequency-variable controller control drainage pump unit deceleration drainage pump 20 draining of adjustable speed, make water level in municipal wastewater collecting well 16 increase.
Step 8, control module judge that water level is the super upper limit or super lower limit, if the super upper limit, then jump to step 9, if super lower limit, then jump to step 10.
Step 9, when unusual weather conditions, down-pour, when the urban sewerage and drainage amounts such as water pipe explosion are many especially, there is super upper limit phenomenon in water level in waste water collecting well, and the measure of control module startup super upper limit emergent management, jumps to step 11 after completing.
Step 9 comprises following steps:
Step 9.1, PLC send super upper limit alarm automatically, notice pumping plant operator on duty.
Step 9.2, operator on duty meet an urgent need and manually start redundant sump pump unit, and the grid-connected of redundant sump pump unit is enabled, and can make the double increase of drainability, and municipal wastewater collecting well 16 water level is reduced, and recovers setting value.
Step 10, when unusual weather conditions, especially arid, urban sewerage and drainage amount is few especially again, and super lower limit phenomenon appears in water level in waste water collecting well, and the measure of control module startup super lower limit emergent management, jumps to step 11 after completing.
Step 10 comprises following steps:
Step 10.1, PLC send super lower limit alarm automatically, notice pumping plant operator on duty.
Step 10.2, the emergent artificial closedown normality drainage pump unit of operator on duty, by the drainage pump machine isolated operation of adjustable speed.
The equal permanent water level exhaust system of step 11, municipal wastewater collecting well maintains controlling water level, and jumps to step 2.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.

Claims (9)

1. the equal permanent water level exhaust system of municipal wastewater collecting well, it is characterized in that, this system comprises:
Municipal wastewater collecting well (16), its lower sidewall is provided with municipal wastewater water inlet (15), and municipal wastewater enters municipal wastewater collecting well (16) by municipal wastewater water inlet (15); Municipal wastewater collecting well (16) top is provided with upper limit level sensor (02) and lower limit level sensor (03);
Waste water tunnel (18), it is connected to the lower sidewall of described municipal wastewater collecting well (16);
Drainage pump (20), its drainage pump water inlet (15) connects described waste water tunnel (18) top;
Water pushing pressure well (23), it is connected with described drainage pump (20), and drainage pump delivery port (21) is communicated to the sidewall bottom of water pushing pressure well (23);
Send aquaporin (25), its water inlet is connected to described water pushing pressure well (23) by sidepiece;
High-order wet well (09), sending the delivery port of aquaporin (25), being communicated with by sending aquaporin (25) with water pushing pressure well (23) described in its connection;
High-order wet well delivery port (10), it is arranged at the side wall upper part of described high-order wet well (09), and municipal sewage is delivered to follow-up treatment tank;
Control module and drainage pump motor (06), control module receives waste water level in the municipal wastewater collecting well (16) that described upper limit level sensor (02) and lower limit level sensor (03) detect, and according to the waste water level in municipal wastewater collecting well (16), variable frequency control is carried out to drainage pump motor (06), thus control the drain discharge of drainage pump (20), comprise the drainage pump unit of normality drainage pump unit and adjustable speed in described drainage pump motor (06); The drainage pump unit of more than one or one adjustable speed is provided with in described drainage pump motor (06);
When in municipal wastewater collecting well (16), waste water level reaches upper limit, then drainage pump motor (06) faster rotational speed, improves drainage pump (20) flow;
When in municipal wastewater collecting well (16), waste water level reaches lower limit, then drainage pump motor (06) spin down, reduces drainage pump (20) flow.
2. the equal permanent water level exhaust system of municipal wastewater collecting well as claimed in claim 1, it is characterized in that, described control module comprises:
PLC, it receives the waste water level that described upper limit level sensor (02) and lower limit level sensor (03) detect, and exports corresponding control instruction according to waste water level;
Frequency-variable controller, it receives the control instruction that PLC exports, and controls the drain discharge that drainage pump motor (06) regulates described drainage pump (20).
3. the equal permanent water level exhaust system of municipal wastewater collecting well as claimed in claim 1, it is characterized in that, described drainage pump delivery port (21) place is provided with drainage pump unidirectional cutoff door (22).
4. the equal permanent water level exhaust system of municipal wastewater collecting well as claimed in claim 1; it is characterized in that; the top of described water pushing pressure well (23) is provided with water pushing pressure well servicing mouth (24); when the equal permanent water level exhaust system of municipal wastewater collecting well is shut down anhydrous, personnel enter system maintenance maintenance by this water pushing pressure well servicing mouth (24).
5. a discharge method for permanent water level exhaust system as equal in the municipal wastewater collecting well in claim 1 to 4 as described in any one, it is characterized in that, the method includes the steps of:
Step 1, control module control drainage pump (20) and drainage pump motor (06) starts;
Step 2, upper limit level sensor (02) and lower limit level sensor (03) detect the waste water level in municipal wastewater collecting well (16), and transfer to control module;
Step 3, control module judge that in municipal wastewater collecting well (16), whether waste water level situation transfinites, and if not, then jumps to step 4, if so, then jumps to step 8;
Step 4, control module judge that whether water level is close to the upper limit, if so, then jumps to step 5, if not, then jump to step 6;
Step 5, control module accelerate drainage pump (20) rotating speed by drainage pump motor (06), thus reduce municipal wastewater collecting well (16) interior water level, and jump to step 11;
Step 6, control module receive lower limit level sensor (03) detection information, and judge that whether water level is close to lower limit, if so, then jumps to step 7, if not, then jump to step 4;
Step 7, control module reduce drainage pump (20) rotating speed by drainage pump motor (06), thus improve municipal wastewater collecting well (16) interior water level, and jump to step 11;
Step 8, control module judge that water level is the super upper limit or super lower limit, if the super upper limit, then jump to step 9, if super lower limit, then jump to step 10;
Step 9, control module start the measure of super upper limit emergent management, jump to step 11 after completing;
Step 10, control module start the measure of super lower limit emergent management, jump to step 11 after completing;
The equal permanent water level exhaust system of step 11, municipal wastewater collecting well maintains controlling water level, and jumps to step 2.
6. the discharge method of the equal permanent water level exhaust system of municipal wastewater collecting well as claimed in claim 5, it is characterized in that, described step 5 comprises following steps:
Step 5.1, PLC control normality drainage pump unit and normally work;
Step 5.2, PLC export upper limit drive singal to frequency-variable controller;
The drainage pump unit that step 5.3, frequency-variable controller control adjustable speed accelerates to drive drainage pump (20) draining, and the interior water level of municipal wastewater collecting well (16) is reduced.
7. the discharge method of the equal permanent water level exhaust system of municipal wastewater collecting well as claimed in claim 5, it is characterized in that, described step 7 comprises following steps:
Step 7.1, PLC bottoming drive singal are to frequency-variable controller;
Step 7.2, frequency-variable controller control drainage pump unit deceleration drainage pump (20) draining of adjustable speed, make the interior water level of municipal wastewater collecting well (16) increase.
8. the discharge method of the equal permanent water level exhaust system of municipal wastewater collecting well as claimed in claim 5, it is characterized in that, described step 9 comprises following steps:
Step 9.1, PLC send super upper limit alarm;
Step 9.2, operator on duty meet an urgent need and manually start redundant sump pump unit, and municipal wastewater collecting well (16) water level is reduced.
9. the discharge method of the equal permanent water level exhaust system of municipal wastewater collecting well as claimed in claim 5, it is characterized in that, described step 10 comprises following steps:
Step 10.1, PLC send super lower limit alarm;
Step 10.2, the emergent artificial closedown normality drainage pump unit of operator on duty, by the drainage pump machine isolated operation of adjustable speed.
CN201310091903.0A 2013-03-21 2013-03-21 The equal permanent water level exhaust system of municipal wastewater collecting well and discharge method thereof Expired - Fee Related CN104060675B (en)

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