CN111359269A - Method for determining contour of dead angle side slope of sedimentation tank - Google Patents
Method for determining contour of dead angle side slope of sedimentation tank Download PDFInfo
- Publication number
- CN111359269A CN111359269A CN202010181577.2A CN202010181577A CN111359269A CN 111359269 A CN111359269 A CN 111359269A CN 202010181577 A CN202010181577 A CN 202010181577A CN 111359269 A CN111359269 A CN 111359269A
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- Prior art keywords
- slope
- points
- dead
- radius
- sedimentation tank
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- 238000004062 sedimentation Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005352 clarification Methods 0.000 claims description 18
- 239000010802 sludge Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Images
Classifications
-
- 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
- B01D21/02—Settling tanks with single outlets for the separated liquid
-
- 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
- B01D21/0015—Controlling the inclination of settling devices
Abstract
The invention discloses a method for determining the profile of a dead angle side slope of a sedimentation tank, which comprises the following steps: determining the contour of a circumference formed by the bottom surface of the dead-angle side slope based on the preset filling angle and the preset height of the slope of the pool bottom; equally dividing the pool wall corresponding to one fourth of the circumference formed by the bottom surface of the dead angle side slope into a plurality of sections, and forming a plurality of equally divided points on the bottom line of the intersection of the pool wall and the pool bottom; respectively connecting the center of the pool bottom with a plurality of equant points, and forming a plurality of circumference intersection points on one quarter of the circumference; measuring a distance between each of the plurality of bisector points and a corresponding one of the plurality of circumferential intersection points; extending a corresponding distance vertically upward from each of the plurality of bisecting points along the pool wall, thereby forming a plurality of matching points on the pool wall corresponding to the plurality of bisecting points, and determining the length of the corresponding distance based on a predetermined filling angle; and respectively connecting the plurality of matching points with the plurality of circumferential intersection points to form a plurality of connecting lines, wherein the plurality of connecting lines form the outline of the dead angle slope.
Description
Technical Field
The invention relates to a method for determining the contour of a dead-angle side slope of a sedimentation tank.
Background
The sedimentation tank (especially a high-density sedimentation tank) is a building for separating mud from water by utilizing the mutual contact, adsorption and sedimentation of a coagulant and a flocculant and impurity particles in raw water. Sedimentation tank clarification district cell body structure generally is square structure, and the mud that gets into the clarification district evenly settles to the bottom of the pool, and the clarification district bottom of the pool sets up the mud scraper, and the mud scraper uses the drive shaft as the centre of a circle to scrape the arm and be the radius, will subside to the mud in clarification district and scrape into mud collection device at rotatory in-process.
However, since the four corners of the bottom of the tank (referred to as "dead corners") exceed the radius of rotation of the mud scraper, the sludge settled in this area cannot enter the radius of rotation of the mud scraper, and in order to solve this problem, the current general practice is to fill this area with concrete directly into a slope, and the sludge settled in this area falls into the radius area of the arm of the mud scraper disposed in the middle of the tank after encountering the slope, and finally enters the sludge collection area. However, at present, there is no positive determination method for the profile of the slope, so that the constructed slope cannot effectively realize the sludge collection function, sometimes affects the operation of the mud scraper, and affects the process operation and the equipment life.
Disclosure of Invention
Accordingly, the present invention has been made to overcome the problems occurring in the prior art. Accordingly, the present invention provides a method of determining the profile of a dead-angle side slope of a sedimentation basin, the method comprising the steps of: a. determining the outline of a circumference formed by the bottom surface of the dead angle side slope based on a preset filling angle and the preset height of a slope of the bottom of the sedimentation tank, wherein the circumference takes the center of the bottom of the sedimentation tank as the center of a circle, the preset filling angle is the angle of a first intersection line formed by the intersection of a vertical plane passing through the center of the bottom of the sedimentation tank and the dead angle side slope relative to a second intersection line formed by the intersection of the vertical plane and the bottom surface of the dead angle side slope, and the preset height of the slope of the bottom of the sedimentation tank is the vertical distance from the intersection point of the intersection of the slope and the dead angle side slope to the bottom of the sedimentation tank; b. equally dividing the pool wall corresponding to one fourth of the circumference formed by the bottom surface of the dead angle side slope into a plurality of sections, and forming a plurality of equally divided points on the bottom line of the intersection of the pool wall and the pool bottom; c. respectively connecting the center of the pool bottom with the plurality of equally divided points, and forming a plurality of circumference intersection points on one quarter of the circumference; d. measuring a distance between each of the plurality of bisector points and a corresponding one of the plurality of circumferential intersection points; e. extending a corresponding distance vertically upward from each of the plurality of bisecting points along the pool wall, thereby forming a plurality of matching points on the pool wall corresponding to the plurality of bisecting points, the length of the corresponding distance being determined based on a predetermined fill angle; f. and respectively connecting the plurality of matching points with the plurality of circumferential intersection points to form a plurality of connecting lines, wherein the plurality of connecting lines form the outline of the dead angle slope.
Preferably, step (a) comprises: determining the difference between the radius of an inscribed circle of a clarification area of the sedimentation tank and the radius of a circumference formed by the bottom surface of a dead angle side slope based on a preset filling angle and a preset height of a slope of the bottom of the sedimentation tank, wherein the radius of the inscribed circle of the clarification area takes the center of the bottom of the tank as the center of a circle; and determining the radius of the circumference formed by the bottom surface of the dead angle side slope based on the difference of the radii and the radius of the inscribed circle of the clarification area, thereby determining the outline of the circumference formed by the bottom surface of the dead angle side slope.
Preferably, the predetermined height of the slope of the bottom of the sedimentation tank is determined based on a predetermined slope of the slope and an extension length of the slope in the radial direction at the bottom of the tank.
Preferably, the difference between the radius of the circle inscribed in the clarification zone of the sedimentation tank and the radius of the circumference formed by the bottom surface of the dead-end side slope is determined based on the following formula, wherein a is h/tan (α), wherein a is the difference between the radius of the circle inscribed in the clarification zone of the sedimentation tank and the radius of the circumference formed by the bottom surface of the dead-end side slope, h is the predetermined height of the slope of the bottom of the sedimentation tank, and α is the predetermined filling angle.
Preferably, the radius of the circumference formed by the bottom surface of the dead-angle slope is determined based on the following formula: and R is the radius of a circumference formed by the bottom surface of the dead angle slope, and R is the radius of an inscribed circle of the clarification zone, which is half of the side length of the clarification zone.
Preferably, the length of the corresponding distance in step (e) is determined based on the formula c ═ tan (α), where c is the length of the corresponding distance, l is the distance between each of the plurality of bisectors and a corresponding one of the plurality of circumferential intersection points measured in step (d), and α is the predetermined fill angle.
Preferably, the number of the plurality of equally divided points formed in step (b) is 10.
Preferably, the predetermined fill angle is 55 degrees.
Preferably, the predetermined slope of the bottom of the sedimentation basin is 0.07.
In addition, the invention also provides a sedimentation tank which comprises a dead-angle side slope, wherein the outline of the dead-angle side slope is determined according to the method.
Drawings
The advantages and objects of the present invention will be better understood from the following detailed description of the preferred embodiments of the invention when considered in conjunction with the accompanying drawings, in which:
fig. 1 shows a flow chart of a method according to the invention.
Figure 2 shows a schematic view of a sedimentation basin according to the invention.
Fig. 3 shows a schematic diagram for determining a predetermined height of a slope of the bottom of a settling tank of the present invention.
Fig. 4 shows a schematic diagram for determining a number of bisectors on a bottom line of a sedimentation basin according to the invention, where the basin wall intersects the basin bottom.
Fig. 5 shows a schematic view of forming a plurality of circumferential intersections.
Fig. 6 shows a schematic view of forming a slope profile.
Detailed Description
Various embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Here, it is to be noted that, in the drawings, the same reference numerals are given to constituent parts having substantially the same or similar structures and functions, and repeated description thereof will be omitted. Unless otherwise specified, the terms "inwardly," "outwardly," "inner," "outer," "inboard," "outboard" and "inner" herein refer to a range relative to the center of the part, e.g., with reference to the central axis, inner and inner refer to a position or orientation closer to or toward the axis, outer and outer refer to a position or orientation further from the axis, and for each position on the axis, outer or outboard refers to a position further from the center. The term "sequentially comprising A, B, C, etc" merely indicates the order of the included elements A, B, C, etc. and does not exclude the possibility of including other elements between a and B and/or between B and C.
In step 101, the contour of the circumference formed by the bottom surface of the dead side is determined based on a predetermined filling angle and a predetermined height of the slope of the bottom of the sedimentation basin, a predetermined filling angle α is shown in fig. 2, the predetermined filling angle is a pre-designed (e.g. 55 degrees), the predetermined filling angle is defined as the angle of a first intersection line L2 formed by the intersection of a vertical plane S passing through the center of the bottom of the sedimentation basin and the dead side P relative to a second intersection line L2 formed by the intersection of the vertical plane S and the bottom surface of the dead side P, as shown in fig. 2, a slope 1 at the bottom of the sedimentation basin and a sewage pipe 362 at the center of the bottom of the sedimentation basin, the slope β has a predetermined slope and a sewage pipe 36b extending in the radial direction, and a radius of a radius R of the bottom of the sedimentation basin is determined based on the radius of the circumference of the bottom of the sedimentation basin, the radius R of the bottom of the sedimentation basin is a predetermined height of the bottom of the sedimentation basin, the bottom of the sedimentation basin is determined based on the radius of the radius R, the radius of the bottom of the sedimentation basin, the bottom of the sedimentation basin, the bottom of the sedimentation basin, the bottom of the sedimentation basin is determined as shown in the bottom of the sedimentation basin, the bottom of the sedimentation basin, the bottom of the sedimentation basin, the bottom of the basin.
Next, at step 102, equally dividing the pool wall corresponding to one quarter of the circumference formed by the bottom surface of the dead-end slope into a plurality of segments (as shown in fig. 4, 10 segments are equally divided, it is understood that the more segments that are equally divided, the more precise the finally determined contour is), forming a plurality of equally divided points a11, a12, a13, a14, a15, a16, a17, a18, a19 on the bottom line where the pool wall intersects the pool bottom; a21, A22, A23, A24, A25, A26, A27, A28 and A29.
Then, at step 103, the center of the cell bottom is connected to the plurality of bisected points, respectively, a plurality of circumferential intersection points B11, B11 are formed on one quarter of the circumference, as shown in FIG. 5, B11 are measured, at step 104, the distance between each of the plurality of bisected points and a corresponding one of the plurality of circumferential intersection points, e.g., the distance between A11 and B11, etc., is measured, at step 105, a corresponding distance extends vertically upward from each of the plurality of bisected points along the cell wall, thereby forming a plurality of matching points C11, C11, C366, C36c, C.
Finally, in step 106, the matching points and the circumferential intersections are respectively connected to form a plurality of connecting lines, and the connecting lines form a contour of a dead-angle slope, as shown in fig. 6.
After the dead-angle side slope of one corner is determined, the steps can be repeated to determine the dead-angle side slopes of other three corners, so that the contour of the dead-angle side slopes of four corners of the sedimentation tank is finally determined. Based on this profile, dead-angle slopes can be formed in the sedimentation basin.
The invention also provides a sedimentation basin comprising the dead-angle slope profile determined according to the method. The contour of the circumference formed by the bottom surface of the dead-end slope is determined on the basis of the predetermined filling angle and the predetermined height of the slope of the bottom of the sedimentation basin. The contour of the inclined plane of the dead angle side slope is determined based on the contour of the circumference, a plurality of equally divided points on a bottom line of the intersection of the pool wall and the pool bottom of the sedimentation pool, a plurality of corresponding circumference intersection points on the contour of the circumference and a preset filling angle.
The method determines the outline of the dead angle side slope, and then builds the dead angle side slope in the sedimentation tank based on the determined outline of the dead angle side slope, so that the bottom surface is completely fit with the mud scraper at the bottom of the tank, the sediment settled to the dead angle can be completely collected, the sludge collection efficiency settled to the sedimentation tank is improved, and the problem of the fault of the mud scraper caused by the wrong construction is solved.
Although the present invention has been described in detail with reference to the preferred embodiments thereof, it is to be understood that the present invention is not limited to the above-described embodiments, but various modifications and changes may be made by those skilled in the art without departing from the spirit of the present invention, and such modifications and changes are intended to fall within the scope of the appended claims and their equivalents.
Claims (10)
1. A method of determining the contour of a dead-angle side slope of a sedimentation basin, the method comprising the steps of:
a. determining the outline of a circumference formed by the bottom surface of the dead angle side slope based on a preset filling angle and the preset height of a slope of the bottom of the sedimentation tank, wherein the circumference takes the center of the bottom of the sedimentation tank as the center of a circle, the preset filling angle is the angle of a first intersection line formed by the intersection of a vertical plane passing through the center of the bottom of the sedimentation tank and the dead angle side slope relative to a second intersection line formed by the intersection of the vertical plane and the bottom surface of the dead angle side slope, and the preset height of the slope of the bottom of the sedimentation tank is the vertical distance from the intersection point of the intersection of the slope and the dead angle side slope to the bottom of the sedimentation tank;
b. equally dividing the pool wall corresponding to one fourth of the circumference formed by the bottom surface of the dead angle side slope into a plurality of sections, and forming a plurality of equally divided points on the bottom line of the intersection of the pool wall and the pool bottom;
c. respectively connecting the center of the pool bottom with the plurality of equally divided points, and forming a plurality of circumference intersection points on one quarter of the circumference;
d. measuring a distance between each of the plurality of bisector points and a corresponding one of the plurality of circumferential intersection points;
e. extending a corresponding distance vertically upward from each of the plurality of bisecting points along the pool wall, thereby forming a plurality of matching points on the pool wall corresponding to the plurality of bisecting points, the length of the corresponding distance being determined based on a predetermined fill angle;
f. and respectively connecting the plurality of matching points with the plurality of circumferential intersection points to form a plurality of connecting lines, wherein the plurality of connecting lines form the outline of the dead angle slope.
2. The method of claim 1, wherein step (a) comprises:
determining the difference between the radius of an inscribed circle of a clarification area of the sedimentation tank and the radius of a circumference formed by the bottom surface of a dead angle side slope based on a preset filling angle and a preset height of a slope of the bottom of the sedimentation tank, wherein the radius of the inscribed circle of the clarification area takes the center of the bottom of the tank as the center of a circle;
and determining the radius of the circumference formed by the bottom surface of the dead angle side slope based on the difference of the radii and the radius of the inscribed circle of the clarification area, thereby determining the outline of the circumference formed by the bottom surface of the dead angle side slope.
3. The method of claim 2,
the predetermined height of the slope of the bottom of the settling tank is determined based on the predetermined slope of the slope and the extension of said slope in the radial direction at the bottom of the tank.
4. The method of claim 2, wherein the difference between the radius of the circle inscribed in the clarification zone of the sedimentation tank and the radius of the circumference formed by the bottom surface of the dead-end slope is determined based on the formula a ═ h/tan (α), where a is the difference between the radius of the circle inscribed in the clarification zone of the sedimentation tank and the radius of the circumference formed by the bottom surface of the dead-end slope, h is the predetermined height of the slope of the bottom of the sedimentation tank, and α is the predetermined filling angle.
5. The method of claim 4, wherein the radius of the circle formed by the bottom surface of the dead-end slope is determined based on the following formula: and R is the radius of a circumference formed by the bottom surface of the dead angle slope, and R is the radius of an inscribed circle of the clarification zone, which is half of the side length of the clarification zone.
6. The method of claim 2, wherein the length of the corresponding distance in step (e) is determined based on the formula c ═ tan (α), where c is the length of the corresponding distance, l is the distance between each of the plurality of bisectors and a corresponding one of the plurality of circumferential intersections measured in step (d), and α is the predetermined fill angle.
7. The method of claim 1, wherein the plurality of bisector points formed in step (b) is 10 in number.
8. The method of claim 1, wherein the predetermined fill angle is 55 degrees.
9. A method according to claim 3, characterized in that the predetermined slope of the bottom of the sedimentation basin is 0.07.
10. A sedimentation tank, characterized in that it comprises a dead-angle side slope, the profile of which is determined according to the method of any one of the preceding claims.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010181577.2A CN111359269B (en) | 2020-03-16 | 2020-03-16 | Method for determining contour of dead angle side slope of sedimentation tank |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010181577.2A CN111359269B (en) | 2020-03-16 | 2020-03-16 | Method for determining contour of dead angle side slope of sedimentation tank |
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| CN111359269A true CN111359269A (en) | 2020-07-03 |
| CN111359269B CN111359269B (en) | 2022-04-29 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102764523A (en) * | 2012-06-27 | 2012-11-07 | 江苏江大环境工程有限责任公司 | Composite sedimentation tank |
| CN204709879U (en) * | 2015-01-21 | 2015-10-21 | 苏州市和源环保科技有限公司 | A kind of square collection immersed tube second pond |
| CN205627206U (en) * | 2016-05-17 | 2016-10-12 | 沈阳环境科学研究院 | Horizontal flow sedimentation tank who is favorable to row sediment arranges sediment device |
| JP2018015760A (en) * | 2016-07-27 | 2018-02-01 | ▲コウ▼鎮企業有限公司 | Deposit recovery device of waste water treatment system |
| CN207827937U (en) * | 2017-12-22 | 2018-09-07 | 无锡德宝水务投资有限公司 | A kind of novel miniaturization sedimentation basin |
| CN208161109U (en) * | 2017-11-30 | 2018-11-30 | 诸暨益通网络科技有限公司 | A kind of small ship type sedimentation tank device for treating sewage |
| CN208436445U (en) * | 2018-04-24 | 2019-01-29 | 浙江荣凯科技发展有限公司 | Sewage pre-treatment device is used in a kind of production of dichloro-nicotinic acid |
-
2020
- 2020-03-16 CN CN202010181577.2A patent/CN111359269B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102764523A (en) * | 2012-06-27 | 2012-11-07 | 江苏江大环境工程有限责任公司 | Composite sedimentation tank |
| CN204709879U (en) * | 2015-01-21 | 2015-10-21 | 苏州市和源环保科技有限公司 | A kind of square collection immersed tube second pond |
| CN205627206U (en) * | 2016-05-17 | 2016-10-12 | 沈阳环境科学研究院 | Horizontal flow sedimentation tank who is favorable to row sediment arranges sediment device |
| JP2018015760A (en) * | 2016-07-27 | 2018-02-01 | ▲コウ▼鎮企業有限公司 | Deposit recovery device of waste water treatment system |
| CN208161109U (en) * | 2017-11-30 | 2018-11-30 | 诸暨益通网络科技有限公司 | A kind of small ship type sedimentation tank device for treating sewage |
| CN207827937U (en) * | 2017-12-22 | 2018-09-07 | 无锡德宝水务投资有限公司 | A kind of novel miniaturization sedimentation basin |
| CN208436445U (en) * | 2018-04-24 | 2019-01-29 | 浙江荣凯科技发展有限公司 | Sewage pre-treatment device is used in a kind of production of dichloro-nicotinic acid |
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| CN111359269B (en) | 2022-04-29 |
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