CN110448940B - Mud water treatment system and mud water treatment method for water purification plant - Google Patents

Abstract

The invention discloses a water purification plant sludge water treatment system and a treatment method. The water purification plant sludge water treatment system includes a number of water collection wells, a combined regulating tank, and a water purification plant sedimentation tank and a water purification plant filter tank respectively connected. The concentration tank, sludge balance tank, dehydration system and sludge storage system for storing sludge. The water collection well, concentration tank, sludge balance tank, dehydration system and sludge storage system are made of steel tanks. The advantages are that, Most of the treatment equipment in the sludge water treatment system of the present invention is made of steel and can be customized according to the actual open space area of the water purification plant and then transported to the site for assembly, which greatly shortens the renovation period, reduces the land occupation, and avoids the need for cleaning. The large-scale reconstruction of the water plant ensures that the sludge water treatment system is completed while the water purification plant is operating normally.

Description

A water purification plant sludge water treatment system and treatment method

Technical field

The present invention relates to the technical field of water treatment, and in particular to a treatment system and treatment method for muddy water from a water purification plant.

Background technique

Urban water has always been an important part of urban life, and the source is urban water purification plants. To treat raw water into tap water that meets standards, a water purification plant generally needs to go through mixing, flocculation, sedimentation, filtration, disinfection and then water distribution. During the sedimentation and filtration process, a large amount of muddy water will be produced. The main component of the muddy water is impurities in the raw water. Flocculated particles formed after adding coagulants, and there are generally two places for muddy water to go, direct drainage and direct drainage pipe networks. Direct drainage of muddy water will cause siltation of rivers and lakes, and may cause the river bed or lake bottom to be too high and cause Water pollution, and the direct discharge of muddy water into the pipe network will increase the compliance of the sewage treatment plant and may also block the sewer. The muddy water accounts for 3%-5% of the daily water production of the entire system's water purification plant. Direct drainage will cause a huge waste of water resources.

Many existing water purification plants do not have the ability to treat sludge water due to old equipment and limited space. The open space in the factory area is limited and the construction site is restricted, which is not conducive to the construction of large-scale sludge water treatment equipment. Moreover, many water purification plants pass through Multi-phase construction, underground pipelines are complicated, and the condition of some pipelines is unknown. It is impossible to carry out excavation-type reconstruction of the open space. Moreover, general water purification plants have strict entry and exit regulations, and the daily construction time is limited. At the same time, due to actual use needs, the construction period is relatively long. tight. How to quickly renovate and add a sludge treatment system to the old water purification plant so that the water resources in the water purification plant can be rationally utilized and the sewage discharge reaches the standard is a serious problem.

Contents of the invention

In order to overcome the shortcomings of the prior art, one of the objects of the present invention is to provide a sludge water treatment system for water purification plants.

The second object of the present invention is to provide a method for treating muddy water from a water purification plant, which can be used to transform the muddy water treatment system of an old water purification plant.

One of the purposes of the present invention is achieved by adopting the following technical solutions:

A water purification plant sludge water treatment system, including a number of water collection wells, a combined regulating tank, a concentration tank, a sludge balance tank, a dehydration system and a storage unit respectively connected to the water purification plant sedimentation tank and the water purification plant filter tank. A sludge storage system for sludge. The water collection well, the concentration tank, the sludge balancing tank, the dehydration system and the sludge storage system are steel tanks,

The combined regulating tank includes a drainage tank and a mud drainage tank. A water collection well connected to the filter tank of the water purification plant is connected to the drainage tank. A water collection well connected to the sedimentation tank of the water purification plant is connected to the mud drainage tank. Connected to each other, a sediment conveying device is provided between the drainage pool and the mud drainage pool, a mud water extraction device is provided on the mud outlet of the mud drainage pool, and a supernatant is provided on the water outlet of the drainage pool. Liquid extraction device, the mud water extraction device is provided with a first dosing mechanism and is connected to the concentration tank,

The concentration tank is provided with a uniform mud water feeding structure and a supernatant liquid outlet pipe for uniform mud water feeding, and the concentration tank is connected to the sludge balancing tank.

The sludge balance tank is provided with a pendulum stirring device for modulating and balancing muddy water. The sludge balance tank is connected to the dehydration system. The dehydration system is provided with a second dosing mechanism. The dewatering system is connected to the sludge storage system.

Further, a water level detection mechanism is provided in the drainage tank, and the water level detection mechanism is connected to the supernatant liquid extraction device. A liquid level detection mechanism is provided in the mud drainage tank, and the liquid level detection mechanism is connected to the mud water extraction device. device is connected.

Further, the sediment conveying device includes a truss-type pump suction mud discharger and a guide rail provided at the top of the wall of the drainage pool. The truss type pump suction mud discharge machine moves along the guide rail. The truss type pump suction mud discharge machine moves along the guide rail. The mud suction port is located at the bottom of the drainage pool, and the mud discharge port is located above the mud drainage pool.

Further, the sludge drainage tank and the drainage pool are respectively connected to the water collection well through a separation device. The separation device includes a sewage pipe, a sedimentation tank sludge drainage pipe of the water purification plant connected to the sewage pipe, and a sludge drainage pipe connected to the sewage pipe. The connected water purification plant filter drain pipe, the first control valve for intercepting the backwash water of the water purification plant filter, the second control valve for intercepting the muddy water of the water purification plant sedimentation tank, and the connected sewage pipe. pipe and the water inlet pipe of the drainage pool of the regulating pool and the mud inlet pipe used to connect the sewage pipe and the mud drainage pool of the regulating pool. The water inlet pipe is arranged between the first control valve and the filter tank of the water purification plant. between the drainage pipes; the mud inlet pipe is arranged between the second control valve and the mud discharge pipe of the sedimentation tank of the water purification plant, and the sedimentation tank of the water purification plant is located between the mud inlet pipe and the first control valve. between; the connection between the mud inlet pipe and the sewage pipe is provided with a third control valve for controlling mud water to enter the mud discharge tank.

Further, the uniform mud water inlet structure includes a mud water main pipe arranged in the middle of the concentration tank, several mud water branch pipes connected with the mud water main pipe, and upwardly located outflow holes located on the mud water branch pipes, so A rectifying mud plate is covered above the outflow hole for intercepting the muddy water ejected from the outflow hole, and there is a gap between adjacent rectifying mud plates.

Further, a groove is provided on one side of the rectifying mud plate facing the outflow hole, and the groove corresponds to the position of the outflow hole. The muddy water ejected from the outflow hole hits the in the groove.

Further, the swing-type stirring device includes at least one impeller. The impeller is arranged on a swing rod assembly. A rotating motor is provided in the swing rod assembly to drive the impeller. The swing rod assembly is provided with a driving mechanism. The swing rod is a driving assembly that swings relative to the pool wall.

Further, the driving assembly includes a first motor that drives the swing bar assembly to move left and right, a second motor that drives the swing bar assembly to move up and down, and a controller that controls the first motor and the second motor. The controller The first end and the second end are connected to the first motor and the second motor respectively, wherein the first end outputs a first control signal, the second end outputs a second control signal, and the first control signal The conduction time is different from the conduction time of the second control signal. The pool wall is provided with a mounting base connected to the swing bar assembly. The mounting base is provided with a mounting base for driving the swing bar assembly up and down. Mobile lifting mechanism.

Further, the driving assembly includes a rotating member that performs circumferential motion in a vertical plane and a connecting member that connects the rotating member and the swing lever assembly. The swing lever assembly is driven by the connecting member relative to the The pool wall swings, the connecting piece is a soft rope, the connection between the rotating piece and the connecting piece is provided with a retracting and retracting mechanism for sending and receiving the connecting piece, and the swing rod assembly is at the end of the sending and receiving mechanism. Move up and down under the action.

The second object of the present invention is achieved by adopting the following technical solutions:

A method for treating muddy water from a water purification plant, including the following steps:

The equipment preparation step involves investigating the open space conditions of the water purification plant, making steel pool bodies of corresponding sizes, transporting them to various open spaces, and then assembling them through pipelines.

The steel tank body includes several water collection wells connected to the sedimentation tank and filter tank of the water purification plant respectively, a concentration tank for concentrating mud water, a sludge balancing tank for making mud water uniform, a dehydration system and sludge storage. system;

In the adjustment step, the original wastewater pool of the water purification plant is transformed into a combined regulating pool, which is divided into a drainage pool and a mud drainage pool. The water collection well connected to the filter tank of the water purification plant discharges the filter backwash water into the drainage pool, and is connected to the drainage pool. The water collection well connected to the sedimentation tank of the water purification plant discharges the sludge water into the sludge drainage tank. The sediment at the bottom of the drainage tank is sucked into the sludge drainage tank. The upper supernatant is recycled and used. The mud water in the sludge drainage tank is discharged into the concentration tank. , during which flocculant is added to the muddy water;

In the concentration step, the muddy water enters the concentration tank with a steel tank body. Through the uniform mudwater feeding structure, water is evenly fed, sedimented, and muddy water is separated in the concentration tank. Then the supernatant liquid in the upper part of the concentration tank is recycled, and the mud in the lower part is discharged into the concentration tank. sludge balancing tank;

In the sludge balance and dehydration step, the mud entering the sludge balance tank is stirred evenly by the pendulum stirring device, and then the balanced mud is transported to the dehydration system for mechanical dehydration. The mud blocks are stored in the sludge storage system and are periodically removed. transport.

Compared with the existing technology, the beneficial effects of the present invention are:

(1) Most of the treatment equipment in the sludge treatment system of the present invention is made of steel and can be customized according to the actual open space area of the water purification plant and then transported to the site for assembly, which greatly shortens the renovation period, reduces the occupation of land, and avoids A large-scale reconstruction of the water purification plant was carried out to ensure the normal operation of the water purification plant while completing the establishment of the sludge treatment system;

(2) The supernatant is recycled and utilized in the combined regulating tank and concentration tank, improving water utilization;

(3) Utilize the uniform mud water inflow structure of the concentration tank to achieve full-section water inflow, overcome the problem of short water inflow, ensure the uniformity of water inlet, improve the concentration efficiency, and realize mud water zoning;

(4) The pendulum stirring device is used to speed up the mud-water modulation and balancing speed of the sludge balance tank to ensure that the sludge concentration in the sludge balance tank is consistent. Compared with the traditional fixed-point directional stirring device, fewer stirring devices are used to achieve the desired results. Better mixing effect effectively reduces the cost of the entire sludge water treatment system.

Description of the drawings

Figure 1 is a schematic framework diagram of a processing system according to an embodiment of the present invention;

Figure 2 is a schematic structural diagram of a combined regulating pool according to an embodiment of the present invention;

Figure 3 is a schematic cross-sectional structural diagram of A-A in Figure 2;

Figure 4 is a schematic structural diagram of a sediment conveying device according to an embodiment of the present invention;

Figure 5 is a schematic diagram of the internal structure of the concentration tank according to the embodiment of the present invention;

Figure 6 is a schematic top view of the concentration tank according to the embodiment of the present invention;

Figure 7 is a schematic cross-sectional structural diagram of B-B in Figure 6;

Figure 8 is a schematic structural diagram of a uniform mud water inlet structure according to an embodiment of the present invention;

Figure 9 is a schematic cross-sectional structural diagram of C-C in Figure 8;

Figure 10 is a schematic structural diagram of the sludge balancing tank according to the embodiment of the present invention;

Figure 11 is a schematic cross-sectional structural diagram of D-D in Figure 10;

Figure 12 is a schematic structural diagram of a swing stirring device according to an embodiment of the present invention.

In the picture:

10. Sedimentation tank of water purification plant; 11. Filter tank of water purification plant; 12. Water inlet of water purification plant;

20. Water collection well;

30. Combined regulating tank; 31. Mud drainage tank; 311. Supernatant extraction device; 312. Water level detection mechanism; 313. Supernatant flow control device; 32. Drainage tank; 321. Mud water extraction device; 322. Liquid 323. Mud discharge pipe; 324. First dosing mechanism; 325. Stirring device; 33. Sediment conveying device; 331. Truss type pump suction mud scraper; 332. Guide rail; 333. Mud suction port; 334. Mud discharge port; 335. Mud scraper; 336. Mud scraping assembly; 337. Working bridge; 338. Mud suction pipe; 34. Water inlet device; 341. Sewage pipe; 342. Mud discharge pipe of sedimentation tank of water purification plant ; 343. Water purification plant filter drain pipe; 344. First control valve; 345. Second control valve; 346. Water inlet pipe; 347. Mud inlet pipe; 348. Third control valve; 349. Conversion well; 35. control center;

40. Concentration tank; 411. Upper part; 412. Middle part; 413. Lower part; 414. Tank body; 415. Inclined pipe; 42. Collection tank; 421. Supernatant return pipe; 422. Overflow pipe; 423. Branch tank; 424. Zigzag weir plate; 43. Uniform mud water inlet structure; 431. Mud water inlet main pipe; 432. Mud water inlet branch pipe; 433. Outflow hole; 434. Rectifying mud plate; 435. Gap; 436. Groove; 44. Mud water inlet pipe; 45. Center drive concentrator; 46. Stirring and concentrating grid;

50. Sludge balancing tank; 51. Impeller; 511. Rotating motor; 52. Pendulum assembly; 521. Water pressure detection device; 53. Driving assembly; 531. Rotating parts; 532. Connectors; 533. Retraction mechanism; 54. Mounting base; 541. Universal connector; 542. Lifting mechanism; 543. Track;

60. Dehydration system; 61. Second dosing mechanism;

70. Sludge storage system.

Detailed ways

Below, the present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be noted that, on the premise that there is no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. .

In the description of the present invention, it should be noted that for directional words, there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower" , "Front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise" ", etc. indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation or be in a specific orientation. The construction and operation should not be construed as limiting the specific protection scope of the present invention.

In addition, the terms "first" and "second" if used are for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "several" means two or more, unless otherwise stated. There are clear and specific limitations.

In the present invention, unless otherwise expressly stated and limited, the terms "assembly", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection. Ground connection; it can also be a mechanical connection; it can be directly connected, it can be connected through an intermediate medium, and it can be internally connected between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

As shown in Figure 1, a water purification plant sludge water treatment system includes a plurality of water collection wells 20, a combined regulating tank 30, and a concentration tank 40 that are respectively connected to the water purification plant sedimentation tank 10 and the water purification plant filter tank 11. , sludge balancing tank 50, dehydration system 60 and sludge storage system 70 for storing sludge. The water collection well 20, concentration tank 40, sludge balancing tank 50, dehydration system 60 and sludge storage system 70 are steel tanks. Specifically, most of the treatment equipment in the sludge water treatment system of this embodiment is made of steel and can be customized according to the actual open space area of the water purification plant and then transported to the site for assembly, which greatly shortens the renovation period, reduces the occupation of land, and avoids A large-scale reconstruction of the water purification plant was carried out to ensure the normal operation of the water purification plant while completing the establishment of a sludge treatment system.

The combined regulating tank 30 includes a mud drainage tank 31 and a drainage tank 32. The water collection well 20 connected to the filter tank 11 of the water purification plant is connected to the mud drainage tank 31. The water collection well 20 is connected to the sedimentation tank 10 of the water purification plant. The drainage pool 32 is connected to each other. A sediment conveying device 33 is provided between the mud drainage pool 31 and the drainage pool 32. A mud water extraction device 321 is provided on the mud outlet of the drainage pool 32, and a mud water extraction device 321 is provided on the outlet of the mud drainage pool 31. The supernatant extraction device 311 and the muddy water extraction device 321 are provided with a first dosing mechanism 324, which is connected to the concentration tank 40.

The concentration tank 40 is provided with a uniform mud water inlet structure 43 and a supernatant return pipe 421 for uniform mud water inflow. The concentration tank 40 is connected to the sludge balancing tank 50. The uniform mud water inlet structure 43 of the concentration tank 40 is used to achieve a full-section Water inflow overcomes the problem of short flow of incoming water, ensures the uniformity of incoming water, improves concentration efficiency, and realizes muddy water partitioning.

At the same time, the supernatant liquid is recycled in the combined regulating tank 30 and the concentration tank 40, thereby improving the water utilization rate.

The sludge balance tank 50 is provided with a pendulum stirring device 325 for modulating and balancing muddy water. The sludge balance tank 50 is connected to the dehydration system 60. The dehydration system 60 is provided with a second dosing mechanism 61, and the dehydration system 60 is connected to the dehydration system 60. The sludge storage system 70 is connected. The pendulum stirring device 325 is used to speed up the mud water modulation and balancing speed of the sludge balance tank 50 and ensure that the sludge concentration in the sludge balance tank 50 is consistent. Compared with the traditional fixed-point directional stirring device 325, fewer stirring devices 325 are used. , achieve better mixing effect and effectively reduce the cost of the entire muddy water treatment system.

Each part is now described in detail with reference to the accompanying drawings.

As shown in Figures 2-4, the combined regulating tank 30 of the present invention includes a regulating tank body and a water inlet device 34. The regulating tank body includes a sludge drainage tank 31 for receiving backwash water from the water purification plant filter tank 11 and a water inlet device 34. A sediment conveying device 33 is connected between the drainage pool 31 and the drainage pool 32 for receiving the muddy water from the sedimentation tank 10 of the water purification plant. Compared with the existing regulating pool, the regulating pool of this embodiment has an automatic The control function is specifically mentioned in that the mud drainage pool 31 and the drainage pool 32 are arranged side by side. The mud outlet of the drainage pool 32 is provided with a mud water extraction device 321. The outlet of the mud drainage pool 31 is provided with a supernatant liquid extraction device 311. A water level detection mechanism 312 is provided in the mud pool 31, and the water level detection mechanism 312 is connected to the supernatant liquid extraction device 311. A liquid level detection mechanism 322 is provided in the drainage pool 32, and the liquid level detection mechanism 322 is connected to the mud water extraction device 321. Since the discharge time of the backwash water from the filter tank 11 of the water purification plant is uncertain, the flow rate is not uniform. Therefore, when the sediment in the mud drainage tank 31 is extracted into the drainage tank 32, a clearer supernatant liquid is left behind. When the water level detection mechanism 312 detects that the supernatant reaches the set water level, it starts the supernatant extraction device 311 to recycle the supernatant. Generally, it is sent to the water inlet of the water purification plant and re-enters the water purification system; When the liquid level detection mechanism 322 detects that the liquid level in the drainage pool 32 reaches the set value, the muddy water extraction device 321 starts to work and transfers the muddy water to the concentration pool 40 to prevent the liquid level from being too high and the muddy water from overflowing into the drainage pool 32. The equipment operates automatically and is automatically controlled according to the water level of the regulating pool. There is no need for personnel to perform on-site operations, and there is no need to increase the workload of the original staff. In addition, a stirring device 325 may be provided in the drainage pool 32 to maintain a balance of mud and water in the pool and prevent silt from depositing at the bottom, resulting in a reduction in the capacity of the drainage pool 32 . The supernatant liquid extraction device 311 is connected to a supernatant liquid flow control device 313.

In addition, since the regulating tank is divided into a mud drainage tank 31 and a drainage tank 32, the water inlet device 34 needs to be specially set up. Specifically, the drainage device includes a sewage pipe 341 and a sedimentation tank of a water purification plant connected to the sewage pipe 341. The sludge discharge pipe 342 and the water purification plant filter drain pipe 343 connected to the sewage pipe 341 include a first control valve 344 for intercepting the backwash water of the water purification plant filter 11, and a first control valve 344 for intercepting the sedimentation tank of the water purification plant. The first control valve 344 of the muddy water of 10, the water inlet pipe 346 for connecting the sewage pipe 341 and the mud drainage pool 31 of the regulating pool, and the mud inlet pipe 347 for connecting the sewage pipe 341 and the drainage pool 32 of the regulating pool. The water inlet pipe 346 is set between the first control valve 344 and the water purification plant filter drain pipe 343; the mud inlet pipe 347 is set between the second control valve 345 and the water purification plant sedimentation tank mud drain pipe 342, the water purification plant sedimentation tank 10 It is located between the mud inlet pipe 347 and the first control valve 344; the connection between the mud inlet pipe 347 and the sewage pipe 341 is provided with a third control valve 348 for controlling mud water to enter the drainage pool 32. Multiple control valves are used to control the mud water entering the drainage pool 32 and the mud drainage pool 31, so that the mud drainage water and the backwash water can be separated, and the drainage pool 32 and the mud drainage pool 31 can also be vented and inspected without affecting the operation. When the filter backwash water is recycled and the water plant is operating normally, some of the sludge water can be discharged in an emergency manner.

More specifically, by closing the first control valve 344, the backwash water is intercepted, and the backwash water enters the sewage pipe 341 from the filter drain pipe 343 of the water purification plant, and then enters the mud drainage tank 31; in addition, by closing the first control valve 344, The control valve 344 and the second control valve 345 open the third control valve 348 to intercept the muddy water. The muddy water is discharged from the muddy discharge pipe 342 of the sedimentation tank of the water purification plant, enters the sewage pipe 341, and then enters the drainage pool 32. The purpose of dividing and conquering the two; in addition, if the adjustment tank needs to be inspected, the third control valve 348 can be closed, the first control valve 344 and the second control valve 345 can be opened, and the mud drainage tank 31 and the drainage tank 32 will no longer accept the filter. The tank backwash water and sedimentation tank discharge mud water will not affect the normal operation of the water plant. Since the cleaning time of the sedimentation tank 10 of the water purification plant is inconsistent with the backwashing time of the filter, and the water volume is different, when the sedimentation tank 10 of the water purification plant is being cleaned and a large amount of mud is discharged, the volume of mud discharged will far exceed the available volume of the drainage tank 32 , therefore while the sludge tank 31 is recovering, the sludge water needs to be discharged urgently. The specific operation is to open the second control valve 345, close the first control valve 344 and the third control valve 348, and let the cleaning water and large sludge water pass through the sewage. The pipe enters the municipal pipe network. After the mud water in the drainage tank 31 settles, part of the mud water in the drainage tank 32 also enters the concentration tank 40. Therefore, the sediment transport device 33 can be used to send the sediment in the drainage tank 31 to the drainage tank 32. At this time, The water level detection mechanism 312 in the mud pool 31 monitors water level changes to provide feedback signals to control the supernatant extraction device 311 to achieve separation of the supernatant and bottom mud.

Taking into account the original structural facilities and site conditions of the water plant, a conversion well 349 is provided at the connection between the mud inlet pipe 347 and the sewage pipe 341. The third control valve 348 is located in the conversion well 349. Open the third control valve 348, and through the conversion The well 349 conversion function allows muddy water to enter the drainage pool 32. More specifically, the third control valve 348 is a butterfly valve to facilitate adjustment of mud water flow.

Regarding the position setting of the first control valve 344, the first control valve 344 in this embodiment is set at the connection between the water inlet pipe 346 and the sewage pipe 341, and can be set as a stop valve to prevent the muddy water from backwashing into the drainage pool, and also The first control valve 344 can be set as a gate valve, and the gate valve is opened to ensure that the backwash water can be discharged into the drainage pool 32, preventing overflow of the mud drainage pool 31, and not interfering with the water purification plant and the filter tank. normal work.

The water level detection mechanism 312 in the mud drainage pool 31 and the liquid level detection mechanism 322 in the drainage pool 32 are ultrasonic liquid level meters. In practical applications, they include a control center 35. The control center 35 is a PLC control cabinet. The water level detection mechanism 312 and liquid The level detection mechanism 322 is connected to the control center 35. The mud water extraction device 321 is a submersible pump. The ultrasonic liquid level meter monitors the water levels in the mud drainage pool 31 and the drainage pool 32. When the water level reaches a certain level, the signal will be fed back to the PLC control cabinet, and then Start the submersible pump switch to pump water. When the water level drops to the set water level, the signal will be fed back to the PLC control cabinet, and then the submersible pump will be closed. The submersible pump is connected to the concentration tank 40. The principle of the supernatant extraction device 311 is the same as above. The supernatant extraction device 311 is a recovery water pump and is connected to the water inlet 12 of the water purification plant.

The sediment conveying device 33 used in this embodiment includes a truss-type pumping mud scraper 331 and a guide rail 332 provided at the top of the tank wall of the mud discharge tank 31. The truss-type pumping mud scraper 331 moves along the guide rail 332. The mud suction port 333 of the pump suction scraper 331 is located at the bottom of the mud discharge pool 31 , and the mud discharge port 334 is provided above the drainage pool 32 . The truss-type pump suction scraper 331 moves back and forth along the guide rail 332, absorbs the sediment at the bottom of the drainage pool 31, and discharges it into the drainage pool 32 through the drainage port 334, thereby realizing the separation of the supernatant liquid and the sediment.

More specifically, the truss type pump suction scraper 331 is provided with a number of scrapers 335 at the bottom, and the adjacent scrapers 335 are inclined toward the middle suction port 333. The truss type pump suction scraper 331 includes a The mounting bracket for installing the scraper 335. When the truss type pump suction mud scraper 331 is moving, the mud scraper 335 concentrates the bottom mud to the mud suction port 333, which facilitates the mud suction port 333 to absorb, reduces the number of mud suction ports 333, and improves the mud suction efficiency.

Another type of mud scraping structure is that the bottom of the truss type pump suction mud scraper 331 is provided with a diamond-shaped mud scraper assembly 336, and the mud suction port 333 is located between the two mud scraper assemblies 336. The truss type pump suction mud scraper 331 includes a The mounting bracket for installing the mud scraper assembly 336 facilitates the truss type pump suction scraper 331 to scrape mud during its back and forth movement, thereby improving the mud scraping efficiency and achieving a better mud scraping effect.

Since the area of the regulating tank is large, in order to facilitate maintenance, a truss-type pump suction scraper 331 across the mud discharge tank 31 can be used, and a working bridge 337 is provided at the top of the truss type pump suction mud scraper.

In addition, the amount of sediment in the mud discharge tank 31 may not be large, and it is inconvenient to move it in the mud suction pipe 338 of the truss type pump suction scraper 331. Therefore, the two adjacent mud suction ports 333 in this embodiment are The same mud suction pipe 338 is connected, and the mud suction pipe 338 is connected to the mud discharge port 334, which saves the material of the truss type pump suction mud scraper 331, collects the bottom mud in advance, and conveniently transports it to the mud discharge port 334 and enters the drainage. Pool 32.

Since the drainage pool 32 is connected to the concentration tank 40, in order to speed up the treatment process and improve the sludge sedimentation rate, the mud water extraction device 321 includes a sludge drainage pipe 323 connected to the concentration tank 40, and a first dosing agent is provided in the sludge drainage pipe 323. Mechanism 324, the first dosing mechanism 324 includes a pipe mixer, in which the flocculant and muddy water are mixed.

As shown in Figures 5-9, the uniform mud water inlet structure 43 of the present invention divides the concentration tank 40 into an upper part 411 and a lower part 413. After the mud water enters the concentration tank 40, it passes through the natural sedimentation area, the inclined tube 415 sedimentation area and the supernatant in sequence. In the liquid water collection area, the lower part 413 of the concentration tank 40 is provided with a central drive concentrator 45 and a stirring concentration grid 46 to concentrate the bottom sludge.

In order to ensure the uniformity of the incoming mud water and overcome the problem of short flow of incoming water in the past, the uniform mud water inlet structure 43 of the present invention is connected to the mud water inlet pipe 44 and the concentration tank 40 respectively, including the incoming mud water provided in the middle part 412 of the concentration tank 40 The main pipe 431, several muddy water branch pipes 432 connected with the muddy water main pipe 431, and upwardly located outflow holes 433 located on the muddy water branch pipes 432. The upper part of the outflow hole 433 is covered with a cover for intercepting the water emitted from the outflow hole 433. Mud water rectifying mud plates 434, and gaps 435 exist between adjacent rectifying mud plates 434.

The mud water main pipe 431 arranged in the middle part 412 of the concentration tank 40 and several mud water branch pipes 432 connected with the mud water main pipe 431 are used to enter the water. Then, the mud water flows from the outlet hole 433 located upward on the mud water branch pipe 432. It is ejected and hits the rectifying mud plate 434 provided above the outlet hole 433. The muddy water is scattered and falls, and then driven by the subsequently injected muddy water, it turns to flow upward. The muddy water changes direction multiple times, and each time the direction changes, the muddy water changes direction. Disperse one side, and then the muddy water is evenly distributed on the entire plane. At the same time, the running process of the muddy water is lengthened, and the velocity gradient is also constantly changing. The contact time with the higher concentration of muddy water in the concentration tank 40 is longer, which increases the probability of particle collision. opportunity to improve the flocculation effect and the efficiency of sedimentation and concentration. The precipitated water rises from the gap 435 between the rectifying mud plates 434 to the sedimentation area of the inclined tube 415, and is precipitated again to form a supernatant liquid that enters the supernatant water collection area, enters the water collection tank 42, and is recycled. During this process, the outflow speed is required, and the speed can be achieved by setting up a water pump and limiting the aperture of the outflow hole 433. The aperture range of the outflow hole 433 is 9mm ~ 16mm.

More specifically, a groove 436 is provided on the side of the rectifying mud plate 434 facing the outflow hole 433. The groove 436 corresponds to the position of the outflow hole 433, and the muddy water ejected from the outflow hole 433 hits the groove. In 436, due to the setting of the groove 436, the impact angle of the muddy water is different, and the dispersion angle and speed after the impact are also different. The contact time with the higher concentration of muddy water in the pool increases, increasing the chance of particle collision, and improving the flocculation effect and sedimentation. In order to improve the efficiency of concentration, the shape of the groove 436 can be in various forms, such as inclined grooves, arc-shaped grooves, etc. Preferably, the groove 436 is an inverted "V"-shaped groove, and the angle is generally greater than 45°.

In addition, in order to prevent the muddy water ejected from the outflow hole 433 from contacting the rectifying mud plate 434, the rectifying mud plate 434 is an inverted "V" shaped strip, and the cover is located above each muddy water inlet branch pipe 432 to ensure that Each stream of water undergoes at least one collision and change of direction.

At the same time, in order to achieve uniform water inflow across the entire section, a number of mud water branch pipes 432 are arranged in parallel on both sides of the mud water main pipe 431, distributed in an antenna shape, involving every part of the horizontal plane 412 in the middle part of the concentration tank 40, and each mud water branch pipe 432 are covered with rectifying mud plates 434 to ensure that the incoming mud water is evenly distributed on the entire section.

In order to shorten the construction time of the concentration tank 40, the tank body 414 of the concentration tank 40 in this embodiment is an integrated steel structure. After the production is completed, it is transported to the required place, and then the internal structure and equipment are assembled, which greatly shortens the time of the water purification plant. The construction period of the sludge water treatment system. Due to the limitations of the working environment, the surface of the tank body 414 of the concentration tank 40 has undergone anti-corrosion treatment, has anti-aging porcelain properties, has a long service life, and is easy to maintain.

After the muddy water enters from the uniform muddy water inlet structure 43, it gradually settles and stratifies. The upper part 411 of the high-efficiency concentration tank 40 is provided with an inclined tube 415. The rectifying mud plate 434 is located below the inclined tube 415. The muddy water entering the inclined tube 415 is further processed. Precipitation, this area is the sedimentation area of the inclined tube 415.

After further sedimentation of the muddy water through the inclined pipe 415, the content of impurities such as suspended solids is greatly reduced and reaches the recovery standard. Therefore, a supernatant water collection area is provided above the sedimentation area of the inclined pipe 415, and a water collection tank 42 is provided in the supernatant water collection area. , the water collection tank 42 is located above the inclined pipe 415, and the water collection tank 42 is provided with a supernatant return pipe 421 and an overflow pipe 422. The supernatant liquid enters the water collection tank 42 and then enters the supernatant liquid return pipe 421 for recycling. When there is too much supernatant liquid, in order to avoid overflow, the excess supernatant liquid can be discharged from the overflow pipe 422.

In order to increase the collection surface of the supernatant, several branch grooves 423 are connected on both sides of the water collection tank 42. The branch grooves 423 include serrated weir plates 424 arranged on both sides. When the supernatant liquid is lower than the saw teeth of the weir plate, no water will flow. The weir plate only serves to retain water; if the water level continues to rise and is higher than the saw teeth, the supernatant liquid will enter the branch groove 423 and then flow into the water collection tank, ensuring uniform water collection.

As shown in Figures 10-12, the swing stirring device 325 of the present invention, in addition to the stirring impeller 51 of the conventional stirring device 325, also includes a swing rod assembly 52 that drives the impeller 51 to swing. The impeller 51 in this embodiment It can rotate normally under the driving of the rotating motor 511, and at the same time, it can swing at any angle under the driving of the swing rod assembly 52, which increases the mixing area, reduces dead spots, and improves the mixing efficiency. In order to facilitate the installation of the swing bar assembly 52, a mounting seat 54 connected to the swing bar assembly 52 is provided on the pool wall. In addition, in order to ensure the flexibility of the swing bar assembly 52 and the arbitrary swing angle, the swing bar assembly 52 is installed with the swing bar assembly 52. The seats 54 are connected through universal connectors 541 .

There are many ways of swinging the swing bar assembly 52, which are generally divided into fixed-point swinging back and forth, left and right, and overall up and down movement.

For realizing the forward, backward, left and right swing of the fixed point, in one embodiment, the driving mechanism includes a first motor that drives the swing bar assembly 52 to move left and right, a second motor that drives the swing bar assembly 52 to move up and down, and a motor that controls the first motor and the second motor. Controller, the first end and the second end of the controller are connected to the first motor and the second motor respectively, wherein the first end outputs the first control signal, the second end outputs the second control signal, and the conductor of the first control signal The conduction time is different from the conduction time of the second control signal. By outputting the first control signal and the second control signal with different conduction times, the up and down swing and the left and right swing can have different operating times, so that the swing operating trajectory of the swing rod assembly 52 is continuously changed, realizing large-scale stirring, and stirring There is no "dead zone" in the area, which improves the mixing efficiency. More specifically, one of the first control signal and the second control signal continues to be turned on, and the other of the first control signal and the second control signal is cut off for a preset time according to a preset cycle during the conduction process. The first motor and the second motor operate independently, and the up and down swings and left and right swings have different running times. The swing trajectories are constantly changing to achieve large-scale stirring.

In this embodiment, the overall upward and downward movement can be realized by the lifting mechanism 542 of the mounting base 54. More specifically, a lifting rail 543 is provided on the pool wall, and a lifting motor is provided on the mounting base 54. The mounting base 54 and the lifting rail 543 slip fit, the lifting motor drives the swing rod assembly 52 to move along the lifting track 543. Furthermore, the lifting track 543 can be designed into a trigonometric valley-peak waveform and set around the pool wall.

In another embodiment, a mechanical structure can be used to drive the swing bar assembly 52 to swing. The specific implementation method is: the driving assembly 53 includes a rotating member 531 that performs circumferential motion in a vertical plane and a connection connecting the rotating member 531 and the swing bar assembly 52 Part 532, the swing rod assembly 52 is driven by the connecting part 532 to swing relative to the pool wall. As shown in Figure 2, in order to facilitate the rotation of the rotating member 531, the rotating member 531 is set above the pool wall, continues to rotate, and is connected to the swing component through the connecting member 532. During the rotation of the rotating member 531, the swing component is driven to swing, thereby realizing a large area. At this time, the swing rod assembly 52 does not need to be connected to the pool wall. The swing assembly can swing at any angle under the action of the rotating impeller 51 and the rotating member 531, thereby increasing the mixing area. It can also be connected to the pool wall. The mounting base 54 is connected to realize the direction-changing mixing at a fixed point.

In this way, the overall upward and downward movement mainly relies on the retractable and retractable mechanism 533. More specifically, the connecting member 532 is a soft rope. Mechanism 533, the swing rod assembly 52 moves up and down under the action of the sending and receiving mechanism. Through the retracting and unfolding of the connecting piece 532, the entire swing bar assembly 52 and the impeller 51 move up and down as a whole. A track 543 is provided in the concentration tank 40. The swing bar assembly 52 is slidingly connected to the track 543 and moves up and down along the track 543.

At the same time, in order to determine the swing distance and lifting distance of the pendulum assembly 52, a water pressure detection device 521 is provided on the pendulum assembly 52. The water pressure detection device 521 is connected to the driving mechanism. When the water pressure detection device 521 detects that the water pressure is relatively high, When it is low, the driving mechanism stops rising and lowers the height while continuing to swing to prevent the swing rod assembly 52 from idling.

A sludge balancing tank 50 includes a plurality of the above-mentioned swing stirring devices 325. The swing stirring devices 325 are dispersedly arranged on the inner wall of the sludge balancing tank 50 to achieve full-angle and all-round mixing of the muddy water in the sludge balancing tank 50. Stir to achieve even mixing and homogeneity of mud and water, ensuring that the sludge concentration in the entire tank is consistent and does not settle. Compared with the traditional fixed-point directional stirring device 325, the number of stirring devices 325 can be reduced. Actual testing shows that the number installed in each pool is equivalent to 1/3 of the traditional process.

The dehydration system 60 includes a second pressurizing mechanism and two centrifugal dehydrators, one for use and one for standby, with a single machine capacity of 12-15m3/h, motor power N=22/7.5kW, and variable frequency speed regulation. The drum speed is max4000r/min, and the separation factor is 3200. The supporting equipment of the dewatering machine room includes sludge feeding screw pumps, sludge cutting machines, automatic dosing and dissolving devices, dosing screw pumps, flushing pumps and screw conveyors. The solid content of the mud reaches 20-25%.

The sludge storage system 70 includes a sludge silo, which is used to store dehydrated sludge and can store sludge for 5-7 days; the silo adopts a square flat-bottom structure, and the stored sludge will automatically fall by gravity alone. Specifications of the silo It is 4000×3000×3600mm, with an effective volume of 30m3; supporting facilities include: hydraulic drive slide arch breaking device, discharge screw, hydraulic gate valve, hydraulic power station, electronic control system, etc.

Based on the above system, design a muddy water treatment method for water purification plants, including the following steps:

The equipment preparation step involves investigating the open space conditions of the water purification plant, making steel pool bodies of corresponding sizes, transporting them to various open spaces, and then assembling them through pipelines.

The steel tank body includes several water collection wells connected to the sedimentation tank and filter tank of the water purification plant respectively, a concentration tank for concentrating mud water, a sludge balancing tank for making mud water uniform, a dehydration system and sludge storage. system;

In the adjustment step, the original wastewater pool of the water purification plant is transformed into a combined regulating pool, which is divided into a drainage pool and a mud drainage pool. The water collection well connected to the filter tank of the water purification plant discharges the filter backwash water into the drainage pool, and is connected to the drainage pool. The water collection well connected to the sedimentation tank of the water purification plant discharges the sludge water into the sludge drainage tank. The sediment at the bottom of the drainage tank is sucked into the sludge drainage tank. The upper supernatant is recycled and used. The mud water in the sludge drainage tank is discharged into the concentration tank. , during which flocculant is added to the muddy water;

In the concentration step, the muddy water enters the concentration tank with a steel tank body. Through the uniform mudwater feeding structure, water is evenly fed, sedimented, and muddy water is separated in the concentration tank. Then the supernatant liquid in the upper part of the concentration tank is recycled, and the mud in the lower part is discharged into the concentration tank. sludge balancing tank;

In the sludge balance and dehydration step, the mud entering the sludge balance tank is stirred evenly by the pendulum stirring device, and then the balanced mud is transported to the dehydration system for mechanical dehydration. The mud blocks are stored in the sludge storage system and are periodically removed. transport.

The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantive changes and substitutions made by those skilled in the art on the basis of the present invention fall within the scope of the present invention. Scope of protection claimed.

Claims (3)

1. A water purification plant sludge water treatment system, characterized in that it includes a number of water collection wells, a combined regulating tank, a concentration tank, a sludge balancing tank, and are respectively connected to the water purification plant sedimentation tank and the water purification plant filter tank. Dehydration system and sludge storage system for storing sludge, the water collection well, the concentration tank, the sludge balance tank, the dehydration system and the sludge storage system are steel tanks, The combined regulating tank includes a drainage tank and a mud drainage tank. A water collection well connected to the filter tank of the water purification plant is connected to the drainage tank. A water collection well connected to the sedimentation tank of the water purification plant is connected to the mud drainage tank. Connected to each other, a sediment conveying device is provided between the drainage pool and the mud drainage pool, a mud water extraction device is provided on the mud outlet of the mud drainage pool, and a supernatant is provided on the water outlet of the drainage pool. Liquid extraction device, the mud water extraction device is provided with a first dosing mechanism and is connected to the concentration tank, The concentration tank is provided with a uniform mud water feeding structure and a supernatant liquid outlet pipe for uniform mud water feeding, and the concentration tank is connected to the sludge balancing tank. The sludge balance tank is provided with a pendulum stirring device for modulating and balancing muddy water. The sludge balance tank is connected to the dehydration system. The dehydration system is provided with a second dosing mechanism. The dehydration system is connected to the sludge storage system; The mud drainage tank and the drainage pool are respectively connected to the water collection well through a separation device. The separation device includes a sewage pipe, a sedimentation tank sludge drainage pipe of a water purification plant connected to the sewage pipe, and a cleaning pipe connected to the sewage pipe. The water plant filter drain pipe, the first control valve for intercepting the backwash water of the water purification plant filter, the second control valve for intercepting the muddy water of the water purification plant sedimentation tank, for connecting the sewage pipe and regulating The water inlet pipe of the drainage pool of the pool and the mud inlet pipe used to connect the sewage pipe and the mud drainage pool of the regulating pool. The water inlet pipe is arranged between the first control valve and the drainage pipe of the filter tank of the water purification plant. between; the mud inlet pipe is arranged between the second control valve and the mud discharge pipe of the sedimentation tank of the water purification plant, and the sedimentation tank of the water purification plant is located between the mud inlet pipe and the first control valve; The connection between the mud inlet pipe and the sewage pipe is provided with a third control valve for controlling mud water to enter the mud discharge tank; The uniform mud water inlet structure includes a mud water inlet main pipe arranged in the middle of the concentration tank, several mud inlet water branch pipes connected with the mud inlet water main pipe, and upwardly located outflow holes located on the mud inlet water branch pipes. The outflow holes The upper cover is provided with a rectifying mud plate for intercepting the muddy water ejected from the outflow hole, and there is a gap between adjacent rectifying mud plates; A groove is provided on the side of the rectifying mud plate facing the outflow hole. The groove corresponds to the position of the outflow hole. The muddy water ejected from the outflow hole hits the groove. ; The swing-type stirring device includes at least one impeller. The impeller is arranged on a swing rod assembly. A rotating motor is provided in the swing rod assembly to drive the impeller. The swing rod assembly is provided with a rotating motor to drive the swing rod assembly. A driving assembly for the rod to swing relative to the pool wall; The driving assembly includes a first motor that drives the swing bar assembly to move left and right, a second motor that drives the swing bar assembly to move up and down, and a controller that controls the first motor and the second motor. The first motor of the controller The first terminal and the second terminal are connected to the first motor and the second motor respectively, wherein the first terminal outputs a first control signal, the second terminal outputs a second control signal, and the conduction time of the first control signal Different from the conduction time of the second control signal, the pool wall is provided with a mounting base connected to the swing bar assembly, and the mounting base is provided with a lift for driving the swing bar assembly to move up and down. mechanism; The driving assembly includes a rotating member that performs circumferential motion in a vertical plane and a connecting member that connects the rotating member and the swing rod assembly. The swing rod assembly is driven by the connecting member relative to the pool wall. Swing, the connecting piece is a soft rope, the connection between the rotating piece and the connecting piece is provided with a retraction mechanism for retracting and retracting the connecting piece, the swing rod assembly moves up and down under the action of the retracting mechanism move; The sediment conveying device includes a truss type pump suction mud discharger and a guide rail arranged at the top of the pool wall of the drainage pool. The truss type pump suction mud discharge machine moves along the guide rail. The opening is located at the bottom of the drainage pool, and the mud drainage port is arranged above the mud drainage pool. 2. The muddy water treatment system of a water purification plant as claimed in claim 1, characterized in that a water level detection mechanism is provided in the drainage tank, and the water level detection mechanism is connected to a supernatant extraction device. A liquid level detection mechanism is provided, and the liquid level detection mechanism is connected with the muddy water extraction device. 3. A method for treating muddy water from a water purification plant, characterized in that the method adopts the muddy water treatment system of a water purification plant as described in any one of claims 1 to 2, and the method includes the following steps: The equipment preparation step involves investigating the open space conditions of the water purification plant, making steel pool bodies of corresponding sizes, transporting them to various open spaces, and then assembling them through pipelines. The steel tank body includes several water collection wells connected to the sedimentation tank and filter tank of the water purification plant respectively, a concentration tank for concentrating mud water, a sludge balancing tank for making mud water uniform, a dehydration system and sludge storage. system; In the adjustment step, the original wastewater pool of the water purification plant is transformed into a combined regulating pool, which is divided into a drainage pool and a mud drainage pool. The water collection well connected to the filter tank of the water purification plant discharges the filter backwash water into the drainage pool, and is connected to the drainage pool. The water collection well connected to the sedimentation tank of the water purification plant discharges the sludge water into the sludge drainage tank. The sediment at the bottom of the drainage tank is sucked into the sludge drainage tank. The upper supernatant is recycled and used. The mud water in the sludge drainage tank is discharged into the concentration tank. , during which flocculant is added to the muddy water; In the concentration step, the muddy water enters the concentration tank with a steel tank body. Through the uniform mudwater feeding structure, water is evenly fed, sedimented, and muddy water is separated in the concentration tank. Then the supernatant liquid in the upper part of the concentration tank is recycled, and the mud in the lower part is discharged into the concentration tank. sludge balancing tank; In the sludge balance and dehydration step, the mud entering the sludge balance tank is stirred evenly by the pendulum stirring device, and then the balanced mud is transported to the dehydration system for mechanical dehydration. The mud blocks are stored in the sludge storage system and are periodically removed. transport.