CN111744239A - Intelligent zero-emission drainage method and drainage sedimentation tank applying same - Google Patents

Intelligent zero-emission drainage method and drainage sedimentation tank applying same Download PDF

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Publication number
CN111744239A
CN111744239A CN202010651168.4A CN202010651168A CN111744239A CN 111744239 A CN111744239 A CN 111744239A CN 202010651168 A CN202010651168 A CN 202010651168A CN 111744239 A CN111744239 A CN 111744239A
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water
drainage
depth
tank body
sink
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许元敏
朱成
徐琳
黄丽华
彭昱昱
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Nanjing Tianhe Water Environmental Technology Co ltd
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Nanjing Tianhe Water Environmental Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/30—Control equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2405—Feed mechanisms for settling tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/245—Discharge mechanisms for the sediments

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  • Activated Sludge Processes (AREA)

Abstract

The invention relates to an intelligent zero-emission drainage method, which comprises the following steps: s1: setting maximum value H of water taking depth of undisturbed settling zone of drainage pumpIs provided with(ii) a S2: measuring the supernatant depth H of the first stage of water body precipitation in the tank body1To HIs provided withTime t of (d), primary settling velocity V of particles in the cell bodySink with a metal plate＝HIs provided withT; s3: when the depth of the supernatant is H1To HIs provided withWhen the water pump works, the drainage pump starts to work; s4: water outlet speed VWater (W)＝VSink with a metal plate-a, a is a safety value; s5: flow rate Q of drain pump1＝VWater (W)× S, S is the sedimentation area of the pool body, Q in the initial operation1＝(HIs provided witht-A) × S, S6 monitoring the supernatant depth of the second stage to be H with the period of time t2In the second stage, the particle settling velocity VSink 2＝H2T, repeating the steps S3 to S5 to realize dynamic control and intelligenceControlling the water outlet. The invention also provides a drainage sedimentation tank applying the intelligent zero-discharge drainage method, and the sedimentation tank has the advantages of small floor area and high sedimentation efficiency.

Description

Intelligent zero-emission drainage method and drainage sedimentation tank applying same
Technical Field
The invention relates to an intelligent zero-emission drainage method, and belongs to the technical field of sewage treatment.
Background
The sedimentation tank is a structure for treatment that removes suspended particles having a density greater than that of water from water by gravity sedimentation, is one of the most widely used treatment mechanisms in sewage treatment, and is used for wastewater treatment, post-treatment of biological treatment, advanced treatment, and the like.
The sedimentation tanks commonly used in the market at present comprise an inclined tube sedimentation tank, a horizontal flow sedimentation tank, a vertical flow sedimentation tank, a horizontal flow sedimentation tank and the like. These types of settling tanks have several problems: the maintenance and management of the inclined tube sedimentation tank are difficult, and the inclined tube needs to be replaced after the inclined tube sedimentation tank is used for a period of time; the water inlet and outlet distribution of the horizontal sedimentation tank is not easy to be uniform, and the sludge discharge is inconvenient; the vertical sedimentation tank has large depth of water tank, difficult construction and high cost; the large-flow sedimentation tank occupies a large area, mechanical sludge discharge equipment is complex, and the requirement on construction quality is high. In the actual sewage treatment operation, the conditions of discontinuous water inflow and large instantaneous water inflow often occur, the subsequent processes need to be well matched, and the common sedimentation tanks are not suitable for the conditions and cannot quickly sediment and intelligently discharge water to meet the requirements of the subsequent processes. The traditional sedimentation tank is used for treating the intermittent inflow, the condition of large instantaneous inflow needs larger occupied area or larger cost, the cost performance is low, and the resource waste exists.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an intelligent zero-emission drainage method which can intelligently control water outlet and avoid the damage of the subsequent process caused by impact disturbance precipitation.
In order to achieve the aim, the intelligent zero-emission drainage method comprises the following steps:
s1: a fixed value H is set according to the disturbance depth generated when the drainage pump normally operates to take waterIs provided with，HIs provided withMaximum value without disturbing the precipitation zone;
s2: poolAfter the water is completely fed, the water body in the pool body begins to be precipitated and purified, and the supernatant depth H of the first stage in the pool body is measured1To HIs provided withAt time t, the primary settling velocity V of the particles in the tank bodySink with a metal plate＝HIs provided with/t；
S3: when the depth of the supernatant is H1To HIs provided withWhen the water pump works, the drainage pump starts to work;
s4: according to VSink with a metal plateDetermining the velocity V of the waterWater (W)，VWater (W)＝VSink with a metal plate-a, a is a safety value;
s5: according to VWater (W)Determining flow rate Q of a drainage pump1，Q1＝VWater (W)× S, S is the sedimentation area of the pool body, Q in the initial operation1＝(HIs provided with/t-A)×S；
S6: taking the time t as a period, monitoring the depth of the supernatant liquid in the second stage to be H2In the second stage, the particle settling velocity VSink 2＝H2And t, repeating the steps S3 to S5 to realize dynamic control.
Further, the safety value a is related to the supernatant depth H as follows:
depth of supernatant H Safety value A
H≥1.2HIs provided with 0
1HIs provided with≤H＜1.2HIs provided with (0-5％)VSink with a metal plate
0.8HIs provided with≤H＜1HIs provided with (5-25％)VSink with a metal plate
0.5HIs provided with≤H＜0.8HIs provided with (25-55％)VSink with a metal plate
H＜0.5HIs provided with (55-85％)VSink with a metal plate
In the table, H is the real-time depth of the supernatant depth at the start of the operation of the drain pump.
The intelligent zero-emission drainage method can intelligently control the water outlet according to the change of the water inlet sedimentation speed, has the characteristics of high-efficiency sedimentation and water outlet, is suitable for drainage of various water levels of a sedimentation tank, and can meet the requirements of subsequent processes.
The invention also provides a drainage sedimentation tank applying the intelligent zero-discharge drainage method, which comprises a tank body, wherein one end of the tank body is provided with a water inlet mechanism, the other end of the tank body is provided with a water outlet mechanism, and the bottom of the tank body is provided with a sludge discharge mechanism.
Further, the mechanism of intaking includes inlet tube and multistage water distribution chamber, and the inlet tube extends downwards in the water distribution chamber that is close cell body inner wall one side, and the overflow height of water distribution chamber reduces step by step along the direction of keeping away from the inlet tube and forms multistage overflow and falls the structure.
Furthermore, the water distribution cavity comprises partition plates, the water distribution cavity is formed between every two adjacent partition plates, each partition plate comprises a vertical straight line section and an overflow section at the top of the corresponding straight line section, and each overflow section is in an arc-shaped water outlet slow flow form or a triangular overflow weir form.
Further, the multistage water distribution cavity is a semicircular cavity or a square cavity which is gradually increased along the direction far away from the water inlet pipe.
Further, the bottom end of the water inlet pipe is a slow flow section with an opening gradually enlarged.
Furthermore, go out water mechanism and include pumping device and level gauge, the level gauge is used for real-time measurement cell body supernatant degree of depth and cell body water level, and pumping device is equipped with the drain pump that is used for drawing water including floating the float on the cell body water level on floating, the last drain pump that is used for drawing water that is equipped with of float, and the drain pump is the water pump of variable frequency adjustable flow.
Furthermore, a rocker arm is rotatably connected to the inner wall of the tank body, and one end of the rocker arm, which is far away from the inner wall of the tank body, is rotatably connected to the floating part.
Furthermore, the bottom of the tank body is bucket-shaped or flat, the sludge discharge mechanism is air-stripping sludge discharge or special scraping and sucking machine sludge discharge, the sludge discharge mechanism comprises a sludge discharge pipe at the lowest position of the bottom of the tank body, and the outer end of the sludge discharge pipe is provided with a sludge discharge pump.
The drainage sedimentation tank applying the intelligent zero-discharge drainage method has the following advantages:
1. the sedimentation distance of particles in the water body can be shortened, the formation of sedimentation is accelerated, the water flow speed can be slowed down, the water flow falling height is reduced, and the sludge in a sedimentation area is prevented from being washed away;
2. aiming at the conditions that water is discontinuously fed into a water source and the instantaneous water inflow is large, the floor area is small and the performance-price ratio is high through special water feeding and discharging modes.
Drawings
The present invention will be further described and illustrated with reference to the following drawings.
FIG. 1 is a sectional view of a drainage sedimentation tank to which an intelligent zero-discharge drainage method is applied according to a preferred embodiment of the present invention;
FIG. 2 is a top view of a drainage sedimentation tank to which an intelligent zero-discharge drainage method is applied according to a preferred embodiment of the present invention;
FIG. 3 is a plan view of embodiment 2;
FIG. 4 is a sectional view of embodiment 3.
Reference numerals: 1. a tank body; 21. a water inlet pipe; 211. a slow flow section; 22. a water distribution cavity; 23. a partition plate; 231. a straight line segment; 232. an overflow section; 31. a liquid level meter; 32. a float member; 33. draining pump; 34. a rocker arm; 41. a sludge discharge pipe; 42. a sludge discharge pump.
Detailed Description
The technical solution of the present invention will be more clearly and completely explained by the description of the preferred embodiments of the present invention with reference to the accompanying drawings.
Example 1: as shown in fig. 1 and 2, a drainage sedimentation tank using an intelligent zero-discharge drainage method according to a preferred embodiment of the present invention includes a tank body 1, wherein the tank wall of the tank body 1 is vertical, and the bottom of the tank body 1 is bucket-shaped, which is beneficial to the aggregation of particles in a water body. One end of the tank body 1 is provided with a water inlet mechanism, the other end of the tank body is provided with a water outlet mechanism, the bottom of the tank body 1 is provided with a sludge discharge mechanism, and the sludge discharge mechanism is air-stripping sludge discharge or special scraping and sucking machine sludge discharge. A liquid level meter 31 for measuring the depth of supernatant in the tank body 1 and the water level in the tank in real time is arranged in the tank body 1, and the liquid level meter 31 adopts an infrared ray form or an ultrasonic wave form. The intelligent water outlet control device further comprises a control mechanism for controlling the water outlet speed of the water outlet mechanism, and the control mechanism intelligently controls the water outlet flow of the water outlet mechanism according to the change of the water body particle sedimentation speed so as to realize intelligent water outlet and avoid impact damage to subsequent processes.
As shown in fig. 1 and 2, the water inlet mechanism includes a water inlet pipe 21 and a three-stage water distribution chamber 22, and the three-stage water distribution chamber 22 is a square chamber gradually increasing in a direction away from the water inlet pipe 21. The water inlet pipe 21 extends downwards in the water distribution cavity 22 close to one side of the inner wall of the tank body 1, and the bottom end of the water inlet pipe 21 is a slow flow section 211 with a gradually enlarged opening. The overflow height of the water distribution cavity 22 is gradually reduced along the direction far away from the water inlet pipe 21 to form a three-section overflow falling structure, the water distribution cavity 22 comprises partition plates 23 in the tank body 1, a water distribution cavity 22 is formed between the adjacent partition plates 23, and the water distribution cavity 22 close to one end of the water inlet pipe 21 is formed by the partition plates 23 and the tank wall of the tank body 1. The partition 23 comprises a vertical straight line section 231 and an overflow section 232 at the top of the straight line section 231, wherein the overflow section 232 is in an arc-shaped water outlet slow flow form or a triangular overflow weir form. And the overflow area of the overflow section 232 is also increased step by step, so that the overflow speed is gradually reduced.
As shown in fig. 1 and 2, the water outlet mechanism includes a water pumping device, the water pumping device includes a floating member 32 floating on the water surface in the tank body 1, a water discharge pump 33 for pumping water is arranged at the bottom of the floating member 32, and the water discharge pump 33 is a variable-frequency flow-adjustable water pump. The inner wall of the tank body 1 is rotatably connected with a rocker arm 34, and one end of the rocker arm 34 far away from the inner wall of the tank body 1 is rotatably connected with the floating part 32. The rocker arm 34 can enable the pumping device to freely move up and down along with the liquid level, limit the movement in other directions, keep a stable state during working and avoid the inclination phenomenon. The control means controls the operation frequency of the drain pump 33, thereby realizing the control of the drain water amount.
As shown in figures 1 and 2, the sludge discharging mechanism comprises a sludge discharging pipe 41 at the lowest position of the bottom of the tank body 1, and a sludge discharging pump 42 is arranged at the outer end of the sludge discharging pipe 41.
Example 2: as shown in fig. 3, a drainage sedimentation tank applying an intelligent zero-discharge drainage method is different from embodiment 1 in that three sections of water distribution chambers 22 are semicircular chambers gradually increasing in a direction away from a water inlet pipe 21.
Example 3: as shown in fig. 4, a drainage sedimentation tank applying an intelligent zero-discharge drainage method is different from that of example 1 in that the bottom of a tank body 1 is a flat bottom.
The invention relates to an intelligent zero-emission drainage method, which comprises the following steps:
s1: a fixed value H is set according to the disturbance depth generated when the drainage pump normally operates to take waterIs provided with，HIs provided withMaximum value without disturbing the precipitation zone;
s2: after the water inlet of the tank body is finished, the water body in the tank body begins to precipitate and purify, and the depth H of the supernatant in the first stage in the tank body is measured1To HIs provided withAt time t, the primary settling velocity V of the particles in the tank bodySink with a metal plate＝HIs provided with/t；
S3: when the depth of the supernatant is H1To HIs provided withWhen the water pump works, the drainage pump starts to work;
s4: according to VSink with a metal plateDetermining the velocity V of the waterWater (W)，VWater (W)＝VSink with a metal plate-a, a is a safety value;
s5: according to VWater (W)Determining flow rate Q of a drainage pump1，Q1＝VWater (W)× S, S is the sedimentation area of the pool body, Q in the initial operation1＝(HIs provided with/t-A)×S；
S6: taking the time t as a period, monitoring the depth of the supernatant liquid in the second stage to be H2In the second stage, the settling rate of particlesDegree VSink 2＝H2And t, repeating the steps S3 to S5 to realize dynamic control.
Wherein the safety value A is related to the depth H of the supernatant as follows:
Figure BDA0002575029250000041
Figure BDA0002575029250000051
the specific implementation process comprises the following steps: the water to be treated enters the water distribution cavity 22 from the water inlet pipe 21, overflows along with the gradual rise of the water level of the first-stage water distribution cavity 22, overflows to drive the water flow in the water distribution cavity 22 to rise, overflows to enter the second-stage water distribution cavity 22, and then enters the third-stage water distribution cavity 22 by repeating the process, wherein the water flow path is shown as (r) in fig. 1. Because the overflow area increases step by step, the velocity of water flow rising in each stage of water distribution cavity 22 reduces step by step to the overflow height reduces gradually, and rivers fall and can not erode the mud granule of disturbance bottom of the pool in getting into the pool body 1 from last stage of water distribution cavity 22, still can keep less intake to fall the height under the condition that the water level rises gradually in the pool body 1. After the water inflow is finished, the drainage flow of the drainage pump 33 is intelligently controlled by the control mechanism. And when the water level reaches the lower limit set value, namely the lowest water level value of the sludge at the bottom of the pool is not disturbed, the operation is stopped. When the sludge at the bottom of the tank body 1 is accumulated to a certain degree or runs for a certain time, the sludge discharge unit is started to discharge the sludge.
According to the intelligent drainage sedimentation tank disclosed by the preferred embodiment of the invention, the special multi-stage overflow falling water inlet mode is adopted, the disturbance is reduced, and the formation of sludge particle sedimentation is accelerated.
The above detailed description merely describes preferred embodiments of the present invention and does not limit the scope of the invention. Without departing from the spirit and scope of the present invention, it should be understood that various changes, substitutions and alterations can be made herein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. The scope of the invention is defined by the claims.

Claims (10)

1. An intelligent zero-emission drainage method is characterized by comprising the following steps:
s1: a fixed value H is set according to the disturbance depth generated when the drainage pump normally operates to take waterIs provided with，HIs provided withMaximum value without disturbing the precipitation zone;
s2: after the water inlet of the tank body is finished, the water body in the tank body begins to precipitate and purify, and the depth H of the supernatant in the first stage in the tank body is measured1To HIs provided withAt time t, the primary settling velocity V of the particles in the tank bodySink with a metal plate＝HIs provided with/t；
S3: when the depth of the supernatant is H1To HIs provided withWhen the water pump works, the drainage pump starts to work;
s4: according to VSink with a metal plateDetermining the velocity V of the waterWater (W)，VWater (W)＝VSink with a metal plate-a, a is a safety value;
s5: according to VWater (W)Determining flow rate Q of a drainage pump1，Q1＝VWater (W)× S, S is the sedimentation area of the pool body, Q in the initial operation1＝(HIs provided with/t-A)×S；
S6: taking the time t as a period, monitoring the depth of the supernatant liquid in the second stage to be H2In the second stage, the particle settling velocity VSink 2＝H2And t, repeating the steps S3 to S5 to realize dynamic control.
2. The intelligent zero-emission drainage method of claim 1, wherein the safety value A is related to the supernatant depth H according to the following table:
depth of supernatant H Safety value A H≥1.2HIs provided with 0 1HIs provided with≤H＜1.2HIs provided with (0-5％)VSink with a metal plate 0.8HIs provided with≤H＜1HIs provided with (5-25％)VSink with a metal plate 0.5HIs provided with≤H＜0.8HIs provided with (25-55％)VSink with a metal plate H＜0.5HIs provided with (55-85％)VSink with a metal plate
In the table, H is the real-time depth of the supernatant depth at the start of the operation of the drain pump.
3. The drainage sedimentation tank is characterized by further comprising a control mechanism, and the control mechanism intelligently controls the water outlet flow of the water outlet mechanism according to the sedimentation speed change of water body particles.
4. The drainage sedimentation tank applying the intelligent zero-emission drainage method according to claim 3, wherein the water inlet mechanism comprises a water inlet pipe and a multi-stage water distribution chamber, the water inlet pipe extends downwards in the water distribution chamber close to one side of the inner wall of the tank body, and the overflow height of the water distribution chamber gradually decreases along a direction away from the water inlet pipe to form a multi-stage overflow falling structure.
5. The drainage sedimentation tank applying the intelligent zero-emission drainage method as claimed in claim 4, wherein the water distribution cavity comprises partition plates, the water distribution cavity is formed between adjacent partition plates, the partition plates comprise vertical straight line sections and overflow sections at the tops of the straight line sections, and the overflow sections are in an arc-shaped outlet water buffer flow form or a triangular overflow weir form.
6. The drainage sedimentation tank applying the intelligent zero-emission drainage method according to claim 4, wherein the multi-stage water distribution chamber is a semicircular chamber or a square chamber which gradually increases in the direction away from the water inlet pipe.
7. The drainage sedimentation tank adopting the intelligent zero-emission drainage method as claimed in claim 4, wherein the bottom end of the water inlet pipe is a slow flow section with an opening gradually enlarged.
8. The drainage sedimentation tank applying the intelligent zero-emission drainage method as claimed in claim 3, wherein the water outlet mechanism comprises a water pumping device and a liquid level meter, the liquid level meter is used for measuring the depth of supernatant in the tank body and the water level in the tank body in real time, the water pumping device comprises a floating part floating on the water surface in the tank body, a drainage pump for pumping water is arranged on the floating part, and the drainage pump is a variable-frequency adjustable-flow water pump.
9. The drainage sedimentation tank applying the intelligent zero-emission drainage method as claimed in claim 8, wherein a rocker arm is rotatably connected to the inner wall of the tank body, and one end of the rocker arm, which is far away from the inner wall of the tank body, is rotatably connected to the floating member.
10. The drainage sedimentation tank applying the intelligent zero-emission drainage method according to claim 3, wherein the bottom of the tank body is bucket-shaped or flat, the sludge discharge mechanism is air-stripping sludge discharge or special scraping and sucking machine sludge discharge, the sludge discharge mechanism comprises a sludge discharge pipe at the lowest position of the bottom of the tank body, and a sludge discharge pump is arranged at the outer end of the sludge discharge pipe.
CN202010651168.4A 2020-07-08 2020-07-08 Intelligent zero-emission drainage method and drainage sedimentation tank applying same Pending CN111744239A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113292200A (en) * 2021-05-12 2021-08-24 朱学红 Online multi-parameter automatic rapid water quality detection device in sewage treatment process
CN113501571A (en) * 2021-07-15 2021-10-15 曲靖云铝淯鑫铝业有限公司 Electrolytic aluminum trade electric flocculation defluorination compartment type continuous sedimentation system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113292200A (en) * 2021-05-12 2021-08-24 朱学红 Online multi-parameter automatic rapid water quality detection device in sewage treatment process
CN113501571A (en) * 2021-07-15 2021-10-15 曲靖云铝淯鑫铝业有限公司 Electrolytic aluminum trade electric flocculation defluorination compartment type continuous sedimentation system
CN113501571B (en) * 2021-07-15 2023-04-11 曲靖云铝淯鑫铝业有限公司 Electrolytic aluminum trade electric flocculation defluorination compartment type continuous sedimentation system

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