CN113041668A - Anti-blocking method for mud scraper of power plant wastewater concentration treatment tank - Google Patents
Anti-blocking method for mud scraper of power plant wastewater concentration treatment tank Download PDFInfo
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- CN113041668A CN113041668A CN202110280883.6A CN202110280883A CN113041668A CN 113041668 A CN113041668 A CN 113041668A CN 202110280883 A CN202110280883 A CN 202110280883A CN 113041668 A CN113041668 A CN 113041668A
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- mud scraper
- torque
- sludge
- treatment tank
- power plant
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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
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/245—Discharge mechanisms for the sediments
-
- 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
- B01D21/30—Control equipment
- B01D21/302—Active control mechanisms with external energy, e.g. with solenoid valve
-
- 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
- B01D21/307—Passive control mechanisms without external energy, e.g. using a float
Abstract
The invention provides an anti-blocking method for a mud scraper of a power plant wastewater concentration treatment tank. The invention simplifies the original complicated mechanical torque mechanism with low reliability, improves the measurement precision and ensures the reliability of judging the aggregation degree of the sludge in the treatment tank according to the measured torque; the automatic sequential control sludge discharge and flushing function according to the revolving torque is realized, the step lifting rake of the rake scraping machine can be realized based on the torque control, and meanwhile, the sludge scraping revolving motor and a transmission shaft system are not overloaded through variable frequency speed regulation; the sludge treatment effect is improved, and the power consumption of the sewage pump is reduced; the long-period operation of the slag water system and the desulfurization wastewater concentration tank is realized, the risk of manual dredging, environmental protection and pollution caused by system shutdown is avoided, and the labor cost generated by shutdown of the tank cleaning is saved.
Description
Technical Field
The invention belongs to the technical field of sewage treatment of coal-fired power plants, and particularly relates to a method for preventing a mud scraper of a power plant wastewater concentration treatment tank from being stuck.
Background
The central transmission mud scraper is widely applied to various sewage treatment systems of coal-fired power plants, and has the main functions of carrying out concentration and precipitation treatment on the mud-containing wastewater such as desulfurization wastewater, boiler bottom slag water, industrial wastewater and the like, scraping the sludge generated by sedimentation to a bottom sludge collecting pit, and then discharging the sludge by a sludge discharge pipe pump device to finish the clarification treatment of the mud-containing wastewater.
When the sludge discharge of the concentrated and precipitated sludge is not smooth or in time, the sludge in the concentration tank can be accumulated. The accumulated sludge can cause the rotary rake pressing rake of the mud scraper, the over-limit of the rotary torque, the damage of the rake scraping component, the overload jump stop of the driving motor and other equipment damages. After the abnormity occurs, if the treatment can not be found in time, the sludge can not be discharged normally for a long time, the sludge discharge pipe system can be blocked, the sewage can not be treated normally to reach the standard, and the normal operation of the corresponding process system is influenced. When the sludge is accumulated to cause the damage of the over-moment of the sludge scraping rotary mechanism, the manual pond cleaning and dredging are needed to be stopped, thereby wasting time and labor and polluting the environment. For example, if the desulfurization wastewater is seriously stopped for a long time, the desulfurization slurry ions can exceed the standard and lose effectiveness, and the flue gas is excessively discharged and other environmental protection events can be caused.
Therefore, the problem to be solved by those skilled in the art is to develop a method for effectively preventing sludge accumulation in a concentration tank, which is suitable for various sewage treatment systems of coal-fired power plants.
Disclosure of Invention
In order to solve the problems, the invention discloses a method for preventing a mud scraper from being stuck in a power plant wastewater concentration treatment tank.
In order to achieve the purpose, the invention provides the following technical scheme:
the method comprises the steps of continuously measuring the torque in the rotating mud scraping process of a rotary rake of the mud scraper, judging the aggregation degree of the sludge in a treatment tank through the torque obtained by continuous measurement, and discharging the sludge according to the aggregation degree of the sludge.
Further, the specific method is as follows:
continuously measuring and collecting the torque in the rotating mud scraping process of the rotary rake of the mud scraper and uploading the torque to a DCS (distributed control System);
if the collected torque is larger than the set value MK1Reducing the rotation frequency of the mud scraper through a DCS control system;
if the collected torque is larger than the set value MK2When the rotation frequency of the mud scraper is reduced through the DCS control system, the rotation mechanism of the mud scraper is lifted step by step;
if the collected torque is less than the set value MK3And then the rotating mechanism of the mud scraper is lowered step by step through the DCS control system.
Further, the setting value MK1The normal no-load revolving moment value of the mud scraper is obtained; set value MK2The torque value is allowed for the revolving torque of the mud scraper.
Furthermore, a rotary rake motor of the mud scraper is driven and controlled through a variable frequency driver, and the variable frequency driver is controlled through a torque value obtained by a DCS (distributed control system).
Further, if the collected torque is larger than the set value MK2And the DCS also sends a sludge discharge instruction to start the sludge discharge equipment.
Further, the sludge discharge equipment is a sludge discharge pipe pump.
Compared with the prior art, the invention has the following beneficial effects:
1. the original complicated mechanical torque mechanism with low reliability is simplified, the measurement precision is improved by changing the torque measurement mode of the swing mechanism of the mud scraper, and the reliability of judging the aggregation degree of the sludge in the treatment tank according to the measured torque is ensured; 2. the automatic sequential control sludge discharge and flushing function according to the revolving torque is realized, the step lifting rake of the rake scraping machine can be realized based on the torque control, and meanwhile, the sludge scraping revolving motor and a transmission shaft system are not overloaded through variable frequency speed regulation;
3. the sludge is discharged in time based on the moment change, so that the sludge treatment effect is improved, and the long-term continuous working mode of the original sludge discharge system is avoided; when the rotary torque is large, the precise discharge mode of linkage sludge discharge is realized, and the power consumption of the sewage pump is reduced;
4. the long-period operation of the slag water system and the desulfurization wastewater concentration tank is realized, the risk of manual dredging, environmental protection and pollution caused by system shutdown is avoided, and the labor cost generated by shutdown of the tank cleaning is saved.
Drawings
FIG. 1 is a block diagram of the operational principles of the present invention.
Detailed Description
The technical solutions provided by the present invention will be described in detail below with reference to specific examples, and it should be understood that the following specific embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, which is a block diagram of an operation principle of the invention, the invention provides an anti-blocking method for a mud scraper of a wastewater concentration treatment tank of a power plant, the method comprises the steps of performing drive control on a rotary rake motor of the mud scraper through a variable frequency driver, continuously measuring torque in a rotary mud scraping process of a rotary rake of the mud scraper, judging the aggregation degree of sludge in the treatment tank through the torque obtained through continuous measurement, controlling the variable frequency driver through the torque value obtained by a DCS control system, and discharging mud according to the aggregation degree of the sludge.
The specific method comprises the following steps:
continuously measuring and collecting the torque in the rotating mud scraping process of the rotary rake of the mud scraper and uploading the torque to a DCS (distributed control System);
if the collected torque is larger than the set value MK1Reducing the rotation frequency of the mud scraper through a DCS control system;
if the collected torque is larger than the set value MK2When the rotation frequency of the mud scraper is reduced by the DCS control system, the rotation mechanism of the mud scraper is lifted step by step, and the DCS control system sends outA sludge discharge instruction is carried out, and a sludge discharge pipe pump is started to discharge sludge;
if the collected torque is less than the set value MK3And then the rotating mechanism of the mud scraper is lowered step by step through the DCS control system.
Wherein the set value MK1The normal no-load revolving moment value of the mud scraper is obtained; set value MK2The torque value is allowed for the revolving torque of the mud scraper.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (6)
1. The anti-blocking method of the mud scraper of the power plant wastewater concentration treatment tank is characterized by comprising the following steps: the method comprises the steps of continuously measuring the torque in the rotating rake rotating mud scraping process of the mud scraper, judging the aggregation degree of the sludge in a treatment tank through the torque obtained by continuous measurement, and discharging the sludge according to the aggregation degree of the sludge.
2. The anti-blocking method for the mud scraper of the power plant wastewater concentration treatment tank according to claim 1, characterized in that: the specific method comprises the following steps:
continuously measuring and collecting the torque in the rotating mud scraping process of the rotary rake of the mud scraper and uploading the torque to a DCS (distributed control System);
if the collected torque is larger than the set value MK1Reducing the rotation frequency of the mud scraper through a DCS control system;
if the collected torque is larger than the set value MK2When the rotation frequency of the mud scraper is reduced through the DCS control system, the rotation mechanism of the mud scraper is lifted step by step;
if the collected torque is less than the set value MK3And then the rotating mechanism of the mud scraper is lowered step by step through the DCS control system.
3. According to claimThe anti-blocking method of the mud scraper of the power plant wastewater concentration treatment tank is characterized by comprising the following steps: the set value MK1The normal no-load revolving moment value of the mud scraper is obtained; the set value MK2The torque value is allowed for the revolving torque of the mud scraper.
4. The anti-blocking method for the mud scraper of the power plant wastewater concentration treatment tank according to claim 2, characterized in that: the rotary rake motor of the mud scraper is driven and controlled by a variable frequency driver, and the variable frequency driver is controlled by a torque value acquired by a DCS (distributed control system).
5. The anti-blocking method for the mud scraper of the power plant wastewater concentration treatment tank according to claim 2, characterized in that: if the collected torque is larger than the set value MK2And the DCS also sends a sludge discharge instruction to start the sludge discharge equipment.
6. The anti-jamming method for the mud scraper of the power plant wastewater concentration treatment tank according to claim 5, characterized in that: the sludge discharge equipment is a sludge discharge pipe pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110280883.6A CN113041668A (en) | 2021-03-16 | 2021-03-16 | Anti-blocking method for mud scraper of power plant wastewater concentration treatment tank |
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| CN202110280883.6A CN113041668A (en) | 2021-03-16 | 2021-03-16 | Anti-blocking method for mud scraper of power plant wastewater concentration treatment tank |
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| CN113041668A true CN113041668A (en) | 2021-06-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113885489A (en) * | 2021-07-15 | 2022-01-04 | 无锡万川环境装备技术有限公司 | Self-adaptive mud scraper obstacle avoidance control method and system |
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| US4053421A (en) * | 1976-06-23 | 1977-10-11 | Fmc Corporation | Sedimentation tank with raking structure |
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2021
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| FR2429610A1 (en) * | 1978-06-26 | 1980-01-25 | Degremont | Circular settling tank with central sump and sludge scraper - coupled to rotary, diametral bridge by torque metal transmission |
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| CN1683050A (en) * | 2005-02-24 | 2005-10-19 | 江苏新纪元环保有限公司 | Improved radial-flow settling pond mud scraper |
| WO2008071033A1 (en) * | 2006-12-12 | 2008-06-19 | Fenchao Wu | A continuous subsider with balanced rotation under chassis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113885489A (en) * | 2021-07-15 | 2022-01-04 | 无锡万川环境装备技术有限公司 | Self-adaptive mud scraper obstacle avoidance control method and system |
| CN113885489B (en) * | 2021-07-15 | 2023-09-22 | 无锡万川环境装备技术有限公司 | Self-adaptive mud scraper obstacle avoidance control method and system |
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Application publication date: 20210629 |