CN214880449U

CN214880449U - Take high-efficient sedimentation tank of little sand loading of sludge concentration function

Info

Publication number: CN214880449U
Application number: CN202120695553.9U
Authority: CN
Inventors: 钟民军; 侯中山; 文国栋; 刘力
Original assignee: Wuhan Wotai Waterworks Engineering Co ltd
Current assignee: Wuhan Wotai Waterworks Engineering Co ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-11-26
Anticipated expiration: 2031-04-07

Abstract

The utility model belongs to the technical field of the advanced treatment technology of sewage plant and specifically relates to a take high-efficient sedimentation tank of little sand loading of sludge concentration function, throw the pond, flocculation basin, pipe chute sediment sludge thickener and PLC controller including the distribution canal, thoughtlessly congeal the pond, little sand, the distribution canal, thoughtlessly congeal the pond, the pond is thrown to little sand, flocculation basin and pipe chute sediment sludge thickener set gradually from a left side turning right, are provided with the flowmeter of intaking on the inlet pipe of distribution canal, and distribution canal right side pool wall top is provided with the guiding gutter that feeds through thoughtlessly congeals the pond, and thoughtlessly congeal the pond top and be provided with PAC solution and add the mechanism, is provided with the coagulating stirrer in the thoughtlessly congeals the pond. The utility model discloses in, increased the reliability that the fine sand was retrieved, reduced the loss of fine sand, improved outer mud concentration of arranging, reduced the volume of mud, made mud change the processing, the water loss of reduction system disposes the mud level meter, arranges mud according to the automatic row of mud level height, system's automatic operation.

Description

Take high-efficient sedimentation tank of little sand loading of sludge concentration function

Technical Field

The utility model relates to a sewage plant advanced treatment technology field specifically is a high-efficient sedimentation tank of little sand loading of taking sludge concentration function.

Background

The sewage treatment plant carries out upgrading and reconstruction on the sewage deep treatment process, and the micro sand loading high-efficiency sedimentation tank is usually selected for removing SS and TP. The micro-sand loading efficient sedimentation tank has the advantages of high sedimentation speed, good effluent quality and small occupied area. The high-efficiency micro-sand loading sedimentation tank is provided with special micro-sand recovery equipment. The difference between the density of water and the density of sand is large, the recovery of micro-sand is to convey a mud-sand mixture to a hydraulic cyclone through a slurry pump, the sand with large density falls back into the pool from the bottom of the cyclone by utilizing the centrifugal separation principle, and the light sludge and water overflow from the top and enter a sludge system.

At present, the sand adding sedimentation tank finds that discharged sludge contains more micro-sand which far exceeds a theoretical calculated value in operation. The analysis reason is that the pressure of the feeding hole when the rotational flow design recovery rate is maximum is a fixed value, and the high-efficiency sedimentation tank sludge pump also has a function: the frequency is adjusted in real time according to the inflow rate, the reflux proportion is changed, the pressure of the outlet of the pump is changed, the pressure stability of the feed inlet of the cyclone cannot be guaranteed, and finally the separation effect is not ideal.

In addition, as the silt circulating pump is started for 24 hours, most of sludge is discharged while sand is recovered, the sludge concentration in the sedimentation tank is low, the sludge content in the discharged sludge is low and far meets the requirement of a sludge dewatering room, the discharged sludge amount reaches about 3 percent of the water inflow, the water loss of a sewage plant is large, and the sludge amount is too large to find a proper structure for receiving.

If the sand adding sedimentation tank can concentrate and discharge the sludge, the water loss of the system is reduced, and the sludge treatability is improved. The process of returning sludge and recovering the micro-sand is separated and independently operated, so that the micro-sand loss can be reduced, the operation cost is reduced, and the influence of the micro-sand on other structures is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a take high-efficient sedimentation tank of little sand loading of sludge concentration function has increased the reliability that little sand was retrieved, reduces the loss of little sand, improves outer mud concentration of arranging, reduces the volume of mud, makes mud change the processing, and the water loss of reducing system disposes the mud level meter, according to the automatic mud of arranging of mud level height, system automatic operation to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a micro-sand loading efficient sedimentation tank with a sludge concentration function comprises a water distribution channel, a coagulation tank, a micro-sand feeding tank, a flocculation tank, an inclined tube sedimentation sludge concentration tank and a PLC (programmable logic controller), wherein the water distribution channel, the coagulation tank, the micro-sand feeding tank, the flocculation tank and the inclined tube sedimentation sludge concentration tank are sequentially arranged from left to right, a water inlet flow meter is arranged on an inlet pipe of the water distribution channel, a diversion trench communicated with the coagulation tank is arranged at the top of the right side tank wall of the water distribution channel, a PAC (polyaluminium chloride) solution adding mechanism is arranged above the coagulation tank, a coagulation stirrer is arranged in the coagulation tank, a diversion trench communicated with the micro-sand feeding tank is arranged on the tank wall on the right side of the coagulation tank, a micro-sand feeding tank stirrer is arranged in the micro-sand feeding tank, a diversion trench communicated with the flocculation tank is arranged on the tank wall on the right side of the bottom of the micro-sand feeding tank, and a flocculation tank stirrer is arranged in the flocculation tank, the top of the right side tank wall of the flocculation tank is provided with a diversion trench connected with an inclined tube precipitated sludge concentration tank, the left side of the inclined tube precipitated sludge concentration tank is provided with a diversion cavity which extends to the middle part of the inclined tube precipitated sludge concentration tank and is connected with the diversion trench of the flocculation tank, the inclined tube precipitated sludge concentration tank on the right side of the diversion cavity is internally provided with inclined tube filler, the inclined tube precipitated sludge concentration tank is internally provided with a central transmission sludge scraper at the bottom of the inclined tube precipitated sludge concentration tank, the top of the inclined tube precipitated sludge concentration tank is provided with a water collection tank above the inclined tube filler, the right end of the water collection tank is provided with a water outlet channel, the inclined tube precipitated sludge concentration tank is internally provided with a sludge level meter, a discharge pipe and a discharge pipe are respectively arranged on a discharge port at the bottom of the inclined tube precipitated sludge concentration tank, a cement swirler is arranged above the micro-sand feeding tank, and the discharge pipe is connected with a feed inlet of the cement swirler, be provided with pressure transmitter on the delivery pipe, it deposits the sludge thickening pond end and is provided with the sludge discharge pump to connect the pipe chute on the delivery pipe, it has set gradually mud backwash pump and backward flow sludge flowmeter to turn right from a left side to connect the pipe chute on the back flow and deposits sludge thickening pond end, the back flow discharge end extends to the trace sand and throws the pond top, the trace sand is thrown and is thrown pond top and be provided with PAM solution and add the mechanism.

As a preferred scheme, the PAC solution adding mechanism comprises a PAC solution tank and a fixed displacement pump, a control line of the fixed displacement pump is connected with a PLC controller, the PAM solution adding mechanism comprises a PAM solution tank and a fixed displacement pump, and a control line of the fixed displacement pump is connected with the PLC controller.

As a preferred scheme, the control circuits of the driving motors of the coagulation stirrer, the micro-sand feeding tank stirrer, the flocculation tank stirrer and the central transmission mud scraper are respectively connected with a PLC controller.

As a preferred scheme, a control circuit of the sludge reflux pump driving motor is connected with a PLC (programmable logic controller), a control circuit of the sludge discharge pump driving motor is connected with the PLC, and the sludge reflux pump and the sludge discharge pump driving motors are frequency conversion motors.

As a preferred scheme, the mud level meter is connected with a PLC (programmable logic controller) through a line, the water inlet flow meter is connected with the PLC through a line, and the pressure transmitter is connected with the PLC through a line.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the reliability of micro-sand recovery is increased, and the loss of micro-sand is reduced.

2. The concentration of the discharged sludge is improved, the volume of the sludge is reduced, and the sludge is easier to treat.

3. Reducing the water loss of the system.

4. And a mud level meter is configured, mud is automatically discharged according to the height of the mud level, and the system automatically operates.

Drawings

FIG. 1 is a schematic view of the overall structure of a micro-sand loading high-efficiency sedimentation tank with a sludge concentration function of the utility model;

fig. 2 is a control logic diagram of the micro-sand loading high-efficiency sedimentation tank with the sludge concentration function.

In the figure: 1. a water inlet flow meter; 2. a water distribution channel; 3. a coagulation tank; 4. a coagulation stirrer; 5. a micro-sand feeding tank; 6. a micro-sand feeding tank stirrer; 7. a hydrocyclone; 8. a flocculation tank; 9. a flocculation tank stirrer; 10. a central transmission mud scraper; 11. a water collection tank; 12. a water outlet channel; 13. filling the inclined tube; 14. an inclined tube sedimentation sludge thickener; 15. a mud level meter; 16. a return sludge flow meter; 17. a sludge reflux pump; 18. a sludge discharge pump; 19. a pressure transmitter.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

For better understanding of the above technical solutions, the following detailed descriptions will be provided in conjunction with the drawings and the detailed description of the present invention.

Example (b):

referring to fig. 1-2, the present embodiment provides a technical solution:

a micro-sand loading efficient sedimentation tank with a sludge concentration function comprises a water distribution channel 2, a coagulation tank 3, a micro-sand adding tank 5, a flocculation tank 8, an inclined tube precipitated sludge concentration tank 14 and a PLC (programmable logic controller), wherein the water distribution channel 2, the coagulation tank 3, a micro-sand adding tank 5, the flocculation tank 8 and the inclined tube precipitated sludge concentration tank 14 are sequentially arranged from left to right, a water inlet flow meter 1 is arranged on a feed pipe of the water distribution channel 2, a diversion trench communicated with the coagulation tank 3 is arranged at the top of the right side tank wall of the water distribution channel 2, a PAC solution adding mechanism is arranged above the coagulation tank 3, a coagulation stirrer 4 is arranged in the coagulation tank 3, a diversion trench communicated with the micro-sand adding tank 5 is arranged on the right side tank wall of the coagulation tank 3, a micro-sand adding tank stirrer 6 is arranged in the micro-sand adding tank 5, a diversion trench communicated with the flocculation tank 8 is arranged on the right side tank wall of the bottom of the micro-sand adding tank 5, and a flocculation tank stirrer 9 is arranged in the flocculation tank 8, a flow guide groove connected with an inclined tube precipitated sludge concentration tank 14 is arranged at the top of the right side tank wall of the flocculation tank 8, a flow guide cavity extending to the middle part of the inclined tube precipitated sludge concentration tank 14 and connected with the flow guide groove of the flocculation tank 8 is arranged at the left side of the inclined tube precipitated sludge concentration tank 14, inclined tube filler 13 is arranged in the inclined tube precipitated sludge concentration tank 14 at the right side of the flow guide cavity, a central transmission mud scraper 10 is arranged at the bottom of the inclined tube precipitated sludge concentration tank 14 in the inclined tube precipitated sludge concentration tank 14, a water collection tank 11 is arranged above the inclined tube filler 13 at the top of the inclined tube precipitated sludge concentration tank 14, a water outlet channel 12 is arranged at the right end of the water collection tank 11, a mud level meter 15 is arranged in the inclined tube precipitated sludge concentration tank 14, a return pipe and a discharge pipe are respectively arranged on a discharge port at the bottom of the inclined tube precipitated sludge concentration tank 14, a cement swirler 7 is arranged above the micro-sand feeding tank 5, and the discharge pipe is connected with a feed port of the cement swirler 7, the device is characterized in that a pressure transmitter 19 is arranged on the discharge pipe, a sludge discharge pump 18 is arranged at the end, connected with the inclined pipe precipitated sludge concentration tank 14, of the discharge pipe, a sludge reflux pump 17 and a reflux sludge flowmeter 16 are sequentially arranged at the end, connected with the inclined pipe precipitated sludge concentration tank 14, of the reflux pipe from left to right, the discharge end of the reflux pipe extends to the position above the micro-sand feeding tank 5, and a PAM solution adding mechanism is arranged above the micro-sand feeding tank 5.

Wherein, PAC solution adds the mechanism and includes PAC solution tank and constant delivery pump, the control scheme connection PLC controller of constant delivery pump, PAM solution adds the mechanism and includes PAM solution tank and constant delivery pump, the control scheme connection PLC controller of constant delivery pump, thoughtlessly congeal agitator 4, pond agitator 6 is thrown to the trace sand, the PLC controller is connected respectively to flocculation basin agitator 9 and the driving motor's of central transmission mud scraper 10 control scheme, the PLC controller is connected to the control scheme connection PLC controller of sludge reflux pump 17 driving motor, the PLC controller is connected to the control scheme connection of sludge discharge pump 18 driving motor, the driving motor of sludge reflux pump 17 and sludge discharge pump 18 is inverter type motor, mud level meter 15 passes through the line connection PLC controller, water inlet flowmeter 1 passes through the line connection PLC controller, pressure transmitter 19 passes through the line connection PLC controller.

The working principle is as follows: sewage passes through intake flow meter 1, intake flow meter 1 gathers flow signal and transmits the PLC controller, sewage inflow distribution canal 2 after that, after the rectification wall adjustment of canal wall, flow into thoughtlessly congeal pond 3, the medicament passes through the measuring pump and pours into thoughtlessly the pond into simultaneously, under the stirring of thoughtlessly congealing agitator 4, intensive mixing, the completion is thoughtlessly congealed, the frequency of coagulant measuring pump keeps stable proportional relation according to the flowmeter of measuring pump outlet pipeline and the numerical value adjustment of intake flow meter 1.

The sewage after coagulation flows into a micro-sand adding tank 5, a flocculating agent is injected into a flocculation tank through a pump, micro-sand separated by a hydrocyclone 7 flows into the micro-sand adding tank 5 from an outlet at the bottom of the hydrocyclone, sand, floccules and water are fully mixed under the stirring action of a stirrer 6 of the adding tank, the frequency of a flocculating agent metering pump is adjusted according to the numerical values of a flow meter and a water inlet flow meter 1 of an outlet pipeline of the metering pump, and a stable proportional relation is maintained.

The sewage in the sand adding pool flows into the flocculation pool 8, and under the stirring action of the flocculation stirrer 9, sand, floc and water are fully mixed, so that the flocculation effect is completed by forming floc with larger volume and better settling property. The frequency of the flocculating agent metering pump is adjusted according to the numerical values of the flow meter of the outlet pipeline of the metering pump and the water inlet flow meter 1, and a stable proportional relation is maintained.

After flocculation is completed, sewage enters the inclined tube sedimentation sludge concentration tank 14, and clean water and sludge are separated due to different specific gravities. Clear water passes through the inclined tube filler 13, and small flocs in the water slide to the bottom of the pool after being intercepted by the inclined tube; the clean water continues to rise and flows into the water collection tank 11, and finally is collected in the water outlet channel 12 and discharged to the next structure.

The central transmission mud scraper 10 collects the sludge at the bottom of the tank into a central mud bucket, the return sludge pump 17 extracts the silt in the sludge bucket and injects the silt into the silt adding tank 5 to enhance the flocculation effect, the silt is circulated, the frequency of the return sludge pump is dynamically adjusted according to the inflow flow, and the stable proportional relationship between the return sludge flowmeter 16 and the inflow flowmeter 1 is maintained.

According to the mud level value measured by a mud level meter 15 in the tank, when the mud level is too high, a mud discharge pump 18 pumps mud sand in a mud bucket, the mud sand is injected into a hydrocyclone 7, sand and mud are separated through centrifugal separation, the sand enters a micro-sand feeding tank 5, and the mud is discharged; and the mud level continuously drops along with the progress of mud discharging, and when the mud level drops to a low value, the mud discharging pump is closed, so that the mud discharging is finished. A pressure transmitter 19 at the feed inlet of the hydrocyclone 7 monitors the pressure value and feeds the pressure value back to the PLC, and the system automatically corrects the frequency of the sludge discharge pump 18 to enable the numerical value displayed by the pressure transmitter 19 to be in the numerical value of the optimum working condition point of the hydrocyclone 7; when the frequency of the sludge discharge pump 18 is adjusted to the maximum and the numerical value displayed by the pressure transmitter 19 cannot be in the numerical value of the optimal working point of the hydraulic cyclone 7, the PLC sends out an alarm signal to prompt the sludge pump to be excessively worn and to be maintained.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a take high-efficient sedimentation tank of micro-sand loading of sludge concentration function, includes that distribution channel (2), coagulating basin (3), micro-sand are thrown pond (5), flocculation basin (8), pipe chute deposit sludge thickening tank (14) and PLC controller, its characterized in that: the water distribution channel (2), the coagulation tank (3), the micro-sand feeding tank (5), the flocculation tank (8) and the inclined tube sedimentation sludge concentration tank (14) are sequentially arranged from left to right, a water inlet flow meter (1) is arranged on an inlet pipe of the water distribution channel (2), a diversion trench communicated with the coagulation tank (3) is arranged at the top of the right side tank wall of the water distribution channel (2), a PAC solution adding mechanism is arranged above the coagulation tank (3), a coagulation stirrer (4) is arranged in the coagulation tank (3), a diversion trench communicated with the micro-sand feeding tank (5) is arranged on the tank wall on the right side of the coagulation tank (3), a micro-sand feeding tank stirrer (6) is arranged in the micro-sand feeding tank (5), a diversion trench communicated with the flocculation tank (8) is arranged on the tank wall on the right side of the bottom of the micro-sand feeding tank (5), and a flocculation tank stirrer (9) is arranged in the flocculation tank (8), the top of the right side tank wall of the flocculation tank (8) is provided with a diversion trench connected with an inclined tube precipitated sludge concentration tank (14), the left side of the inclined tube precipitated sludge concentration tank (14) is provided with a diversion cavity which extends to the middle part of the inclined tube precipitated sludge concentration tank (14) and is connected with the diversion trench of the flocculation tank (8), the inclined tube precipitated sludge concentration tank (14) on the right side of the diversion cavity is internally provided with inclined tube filler (13), the inclined tube precipitated sludge concentration tank (14) is internally provided with a central transmission sludge scraper (10) at the bottom of the inclined tube precipitated sludge concentration tank (14), the top of the inclined tube precipitated sludge concentration tank (14) is provided with a water collecting tank (11) above the inclined tube filler (13), the right end of the water collecting tank (11) is provided with a water outlet channel (12), the inclined tube precipitated sludge concentration tank (14) is internally provided with a sludge level meter (15), and a discharge pipe is respectively arranged on a discharge hole at the bottom of the inclined tube precipitated sludge concentration tank (14), little sand is thrown and is added pond (5) top and be provided with cement swirler (7), the feed inlet of delivery union coupling cement swirler (7), be provided with pressure transmitter (19) on the delivery pipe, it deposits sludge thickening pond (14) end and is provided with sludge discharge pump (18) to connect the pipe chute on the delivery pipe, it deposits sludge thickening pond (14) end and turns right from a left side and has set gradually sludge reflux pump (17) and backward flow sludge flowmeter (16) to connect the pipe chute on the back flow, the back flow discharge end extends to little sand and adds pond (5) top, little sand is thrown and is added pond (5) top and is provided with PAM solution and adds the mechanism.

2. The micro-sand loading high-efficiency sedimentation tank with the sludge concentration function according to claim 1, which is characterized in that: PAC solution adds mechanism includes PAC solution tank and constant delivery pump, the PLC controller is connected to the control scheme of constant delivery pump, PAM solution adds mechanism includes PAM solution tank and constant delivery pump, the PLC controller is connected to the control scheme of constant delivery pump.

3. The micro-sand loading high-efficiency sedimentation tank with the sludge concentration function according to claim 1, which is characterized in that: and control circuits of the coagulation stirrer (4), the micro-sand feeding tank stirrer (6), the flocculation tank stirrer (9) and a driving motor of the central transmission mud scraper (10) are respectively connected with a PLC (programmable logic controller).

4. The micro-sand loading high-efficiency sedimentation tank with the sludge concentration function according to claim 1, which is characterized in that: the control circuit of the sludge reflux pump (17) driving motor is connected with a PLC controller, the control circuit of the sludge discharge pump (18) driving motor is connected with the PLC controller, and the driving motors of the sludge reflux pump (17) and the sludge discharge pump (18) are frequency conversion motors.

5. The micro-sand loading high-efficiency sedimentation tank with the sludge concentration function according to claim 1, which is characterized in that: the mud level meter (15) is connected with a PLC (programmable logic controller) through a line, the water inlet flow meter (1) is connected with the PLC through a line, and the pressure transmitter (19) is connected with the PLC through a line.