CN109534494B - Sewage treatment sludge precise monitoring system and monitoring method thereof - Google Patents
Sewage treatment sludge precise monitoring system and monitoring method thereof Download PDFInfo
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- CN109534494B CN109534494B CN201910042308.5A CN201910042308A CN109534494B CN 109534494 B CN109534494 B CN 109534494B CN 201910042308 A CN201910042308 A CN 201910042308A CN 109534494 B CN109534494 B CN 109534494B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1278—Provisions for mixing or aeration of the mixed liquor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/01—Density
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses a sewage treatment sludge precision monitoring system and a monitoring method thereof, wherein the system comprises a plurality of CAST pools, an aeration main pipe, a reflux pump, a residual pump, a liquid level sensor, a sludge concentration detector and a main controller; the output of the aeration main pipe is respectively connected with the CAST tanks through single tank aeration regulating valves, a pressure transmitter is installed at the rear end of each single tank aeration regulating valve, the output of each residual pump is connected with an outflow residual sludge main pipeline, the outflow residual sludge main pipeline is connected with a residual sludge flowmeter, the output of each reflux pump is connected with an outflow reflux sludge main pipeline, the outflow reflux sludge main pipeline is connected with a reflux sludge flowmeter, each outflow residual sludge main pipeline is also connected with a first branch pipeline communicated with other CAST tanks, and each outflow reflux sludge main pipeline is also connected with a second branch pipeline communicated with other CAST tanks. The invention improves the detection precision.
Description
Technical Field
The invention relates to the technical field of precise control, in particular to a precise sludge monitoring system for sewage treatment and a monitoring method thereof.
Background
The CAST biodegradation process (shown as a periodic cycle activated sludge treatment process) belongs to a biodegradation treatment process, wherein the activity of a living body of a tank body is closely related to the degradation treatment capacity of the process on sewage, and the amount of activated sludge in the tank body influences the sludge age of the activated sludge in the tank, the sludge activity and the demand of the activated sludge on nutrients, oxygen and other resources in water. The control of the activated sludge of the existing CAST process is realized by sludge backflow and the discharge and treatment of excess sludge. However, because the existing control method mostly adopts time setting, such as backflow time, excess sludge discharge period and single discharge time, each group of the tank bodies are basically the same, the time setting is single, the activated sludge target and the real-time activated sludge concentration detection value difference in the corresponding time period need to be adjusted by people in the later period, the regulation timeliness is poor, meanwhile, because the differences exist in the working period temperature, the inflow water quality, the inflow water quantity, the aeration quantity and the like of each tank body in the CAST process, the biological increment of each tank body exists in difference, the sludge age of each tank is difficult to be well controlled only by consistent backflow and excess sludge removal control setting, the regulation and control completely depends on manual operation, the labor capacity is large, in addition, the inflow water of a sewage plant has certain fluctuation, such as rainy period, morning and evening and the like, because the process time of the CAST process single tank is relatively fixed, the working maximum liquid level of each tank constantly changes along with the time and the, the real-time activated sludge concentration of each tank is greatly changed along with the change, uncertain factors are brought to period setting and the like, and the normality of process operators is influenced, so that the existing sludge detection method is free from worry of the problems of poor detection effect, complex operation and high labor cost.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide a precise monitoring system and a monitoring method for sludge in sewage treatment. The invention realizes automatic and accurate sludge control and improves the timeliness of the regulation and control of the total sludge amount of each pool; in addition, the problem of accurate calculation of the total amount of the activated sludge under the conditions of liquid level difference, process section difference and the like of each pool can be solved, the detection efficiency is finally improved, the operation is simple, manual operation is not needed, and the labor cost is finally reduced.
In order to achieve the purpose, the invention designs a precise sludge monitoring system for sewage treatment, which comprises more than one CAST pool and also comprises the following components:
an aeration main pipe connected with the blower;
the number of the reflux pumps is the same as that of the CAST tanks and the reflux pumps are respectively arranged in each CAST tank;
the number of the residual pumps is the same as that of the CAST pools and the residual pumps are respectively arranged in each CAST pool;
the number of the liquid level sensors is the same as that of the CAST tanks and the liquid level sensors are respectively arranged in each corresponding CAST tank;
sludge concentration detectors which have the same number with the CAST tanks and are respectively arranged in each CAST tank;
a main controller for monitoring the sludge amount in each CAST tank in real time;
wherein, the output of the aeration main pipe is respectively connected with a corresponding CAST tank through a single-tank aeration regulating valve, the rear end of each single-tank aeration regulating valve is provided with a pressure transmitter, the output of each residual pump is connected with an outflow residual sludge main pipeline, the outflow residual sludge main pipeline is connected with a residual sludge flow meter, the output of each reflux pump is connected with an outflow reflux sludge main pipeline, the outflow reflux sludge main pipeline is connected with a reflux sludge flow meter, each outflow residual sludge main pipeline is also connected with a first branch pipeline which is respectively communicated with other CAST tanks, each outflow reflux sludge main pipeline is also connected with a second branch pipeline which is respectively communicated with other CAST tanks, and the blower, the reflux pump, the residual pump, the liquid level sensor, the sludge concentration detector, the pressure transmitter and the like, The single-tank aeration regulating valve, the residual sludge flow meter and the return sludge flow meter are in signal connection with the main controller, so that the residual total amount of the activated sludge in the single tank is calculated according to the aeration intensity, the liquid level, the activated sludge sampling value, the return sludge flow rate and the residual sludge discharge flow rate, the sludge is discharged into other CAST tanks after the sludge transfer priority queue sequencing is realized according to the total amount of the activated sludge obtained by calculation, and the sequence of return and residual sludge discharge of each tank body is finally controlled.
Furthermore, in order to improve the detection efficiency, an online monitoring instrument for monitoring the pressure at the front end of the aeration disc of the single tank is connected to the aeration regulating valve of the single tank, and the online monitoring instrument is connected with the main controller.
Further, to improve the accuracy of monitoring, the level sensor is located at the bottom of the CAST pool.
Further, an electronic valve is provided on the reflux pump for the convenience of control.
The invention also discloses a monitoring method of the sewage treatment sludge precision monitoring system, which comprises the following steps:
A. setting a sludge concentration MLSSset value and a sludge age SRT value of a current single pool according to the temperature, the season and the historical process conditions of each plant;
B. firstly, detecting the pressure value at the rear end of each single-tank aeration regulating valve by a pressure transmitter arranged at the rear end of each single-tank aeration regulating valve, and expressing the pressure value by Pn;
C. then detecting the sludge concentration of each tank by a sludge concentration detector arranged in each CAST tank, and expressing the sludge concentration by using MLSSn;
D. detecting the liquid level value of the liquid level of each tank by a liquid level sensor arranged in each CAST tank, and expressing the liquid level value by using a Leveln; then calculating the differential pressure of the aeration disc through the obtained liquid level in the CAST tank and the front end pressure of the aeration disc, comparing the visual perception intensity of on-site aeration, and recording the corresponding differential pressure values of different aeration intensities in real time;
E. a Stepn value is predefined by a master controller to be used as the processing stage condition of each CAST pool process at present; the Stepn value is obtained by automatic calculation according to the process treatment sequence of each tank and the process treatment duration of each tank, and the sludge amount of each CAST tank in unit area is monitored in real time and is expressed by Mudn;
F. when Stepn is an aeration stage and Pn-level is greater than Pnset, the aeration intensity is shown to reach a set value, at the moment, Mudn = MLSSn multiplied by level divided by 5.0, wherein 5.0 is the calculated aeration full pool liquid level, and Pnset is a preset value of the full aeration pressure difference set by an operator according to the actual visual perception aeration intensity of each pool;
G. judging the Mudn value in each pool in real time, and starting a reflux pump (3) and a residual pump of the pool to realize reflux transfer sludge and residual sludge discharge when Mudn > = MLSSset; and when Mudn < = MLSSset, stopping a reflux pump (3) and a residual pump of the pond, and stopping the reflux transfer of sludge and the discharge of residual sludge.
Further, in step G, when the multiple pools meet the requirement of allowing backflow or remaining discharge, comparing the sizes of the Mudn values of the pools, then sorting the Mudn values of the pools from large to small, and then performing the operation of preferential backflow according to the order from large to small.
Further, the following steps are added after step G:
H. comparing the total amount of the activated sludge in the pool allowed to flow back or be discharged in surplus with the concentration of the activated sludge of a set target in real time, calculating a sigma Mudn value of the total amount of the sludge, obtaining the flow rate Qs of a surplus pump, and then calculating the sludge discharge time of the surplus sludge according to the following formula:
ts = (∑ (Mudn × Sn))/Qs ÷ SRT ÷ Ns, Ns is the number of simultaneously remaining mud discharge ponds, and Sn is the area of each pond.
The precise sludge monitoring system and the monitoring method for sewage treatment, which are disclosed by the invention, realize automatic and precise sludge control and improve the timeliness of the regulation and control of the total sludge amount of each pool; in addition, the problem of accurate calculation of the total amount of the activated sludge under the conditions of liquid level difference, process section difference and the like of each pool can be solved, the detection efficiency is finally improved, the operation is simple, manual operation is not needed, and the labor cost is finally reduced.
Description of the drawings:
FIG. 1 is a schematic view showing the construction of a precise monitoring system for sludge in sewage treatment according to example 1;
FIG. 2 is a schematic flow chart of a monitoring method of a precise monitoring system for sludge in sewage treatment in example 1.
In the reference symbols: the system comprises a CAST tank 1, an aeration main pipe 2, a reflux pump 3, a residual pump 4, a liquid level sensor 5, a sludge concentration detector 6, a main controller 7, a single-tank aeration adjusting valve 8, a pressure transmitter 9, an outflow residual sludge main pipeline 10, a residual sludge flowmeter 11, an outflow reflux sludge main pipeline 12, a reflux sludge flowmeter 13, a first branch pipeline 14, a second branch pipeline 15, an online monitoring instrument 16 and an electronic valve 17.
Detailed Description
The invention will be further described with reference to the following examples.
Example 1:
as shown in fig. 1 and fig. 2, the precise sludge monitoring system for sewage treatment provided in this embodiment includes more than one CAST pool 1, and further includes the following components:
an aeration main pipe 2 connected with the blower;
the number of the reflux pumps 3 is the same as that of the CAST pools 1 and the reflux pumps are respectively arranged in each CAST pool 1;
the number of the residual pumps 4 is the same as that of the CAST pools 1 and the residual pumps are respectively arranged in each CAST pool 1;
the number of the liquid level sensors 5 is the same as that of the CAST pools 1 and the liquid level sensors are respectively arranged in each CAST pool 1;
a main controller 7 for monitoring the sludge amount in each CAST tank 1 in real time;
wherein, the output of the aeration main pipe 2 is respectively connected with a corresponding CAST tank 1 through a single-tank aeration regulating valve 8, the rear end of each single-tank aeration regulating valve 8 is provided with a pressure transmitter 9, the output of each residual pump 4 is connected with an outflow residual sludge main pipeline 10, the outflow residual sludge main pipeline 10 is connected with a residual sludge flowmeter 11, the output of each reflux pump 3 is connected with an outflow reflux sludge main pipeline 12, the outflow reflux sludge main pipeline 12 is connected with a reflux sludge flowmeter 13, each outflow residual sludge main pipeline 10 is also connected with a first branch pipeline 14 which is respectively communicated with other CAST tanks 1, each outflow reflux sludge main pipeline 12 is also connected with a second branch pipeline 15 which is respectively communicated with other CAST tanks 1, and the air blower and the reflux pump 3 are also connected with a second branch pipeline 15 which is respectively communicated with other CAST tanks 1, The residual pump 4, the liquid level sensor 5, the sludge concentration detector 6, the pressure transmitter 9, the single-tank aeration regulating valve 8, the residual sludge flowmeter 11 and the return sludge flowmeter 13 are in signal connection with the main controller 7, so that the residual total amount of the activated sludge in the single tank is calculated according to the aeration intensity, the liquid level, the activated sludge sampling value, the return sludge flow rate and the residual sludge discharge flow rate, the sludge is discharged into other CAST tanks 1 after the sludge transfer priority queue sequencing is realized according to the total amount of the activated sludge obtained by calculation, and the sequence of return and residual sludge discharge of each tank body is finally controlled.
Furthermore, in order to improve the detection efficiency, an online monitoring instrument 16 for monitoring the pressure at the front end of the aeration disc of the single tank is connected to the aeration regulating valve 8 of the single tank, and the online monitoring instrument 16 is connected with the main controller 7.
Further, in order to improve the monitoring accuracy, the liquid level sensor 5 is located at the bottom of the CAST pool 1.
Further, an electronic valve 17 is provided in the reflux pump 3 for the sake of convenience of control.
The invention also discloses a monitoring method of the sewage treatment sludge precision monitoring system, which comprises the following steps:
A. setting a sludge concentration MLSSset value and a sludge age SRT value of a current single pool according to the temperature, the season and the historical process conditions of each plant;
B. firstly, detecting the pressure value at the rear end of each single-tank aeration regulating valve 8 by a pressure transmitter 9 arranged at the rear end of each single-tank aeration regulating valve 8, and expressing the pressure value by Pn;
C. then detecting the sludge concentration of each tank by a sludge concentration detector 6 arranged in each CAST tank 1, and expressing the sludge concentration by MLSSn;
D. detecting the level value of the liquid level of each tank by a liquid level sensor 5 arranged in each CAST tank 1, and expressing the level value by using a level; then calculating the differential pressure of the aeration disc through the obtained liquid level in the CAST pool 1 and the front end pressure of the aeration disc, comparing the visual perception intensity of the on-site aeration, and recording the corresponding differential pressure values of different aeration intensities in real time;
E. a Stepn value is predefined by a master controller to be used as the processing stage condition of each CAST pool 1 process at present; the Stepn value is obtained by automatic calculation according to the process treatment sequence of each tank and the process treatment duration of each tank, and the sludge amount of each CAST tank 1 in unit area is monitored in real time and is expressed by Mudn;
F. when Stepn is an aeration stage and Pn-level is greater than Pnset, the aeration intensity is shown to reach a set value, at the moment, Mudn = MLSSn multiplied by level divided by 5.0, wherein 5.0 is the calculated aeration full pool liquid level, and Pnset is a preset value of the full aeration pressure difference set by an operator according to the actual visual perception aeration intensity of each pool;
G. judging the Mudn value in each pool in real time, and starting a reflux pump 3 and a residual pump 4 of the current pool to realize the reflux transfer of sludge and the discharge of residual sludge when Mudn > = MLSSset; and when Mudn < = MLSSset, stopping the reflux pump 3 and the residual pump 4 of the pond, and stopping the reflux transfer of sludge and the discharge of residual sludge.
Further, in step G, when the multiple pools meet the requirement of allowing backflow or remaining discharge, comparing the sizes of the Mudn values of the pools, then sorting the Mudn values of the pools from large to small, and then performing the operation of preferential backflow according to the order from large to small.
Further, the following steps are added after step G:
H. comparing the total amount of the activated sludge in the pool allowed to flow back or be discharged in surplus with the concentration of the activated sludge of a set target in real time, calculating the sigma Mudn value of the total amount of the sludge, obtaining the flow rate Qs of the surplus pump 4, and then calculating the sludge discharge time of the surplus sludge according to the following formula:
ts = (∑ (Mudn × Sn))/Qs ÷ SRT ÷ Ns, Ns is the number of simultaneously remaining mud discharge ponds, and Sn is the area of each pond.
The method is used for automatically calculating the pressure difference between the inlet and the outlet of the aeration disc of the tank to evaluate the aeration intensity of the single tank, then calculating the residual amount of the activated sludge in the single tank according to the aeration intensity, the liquid level, the sampling value of the activated sludge, the flow rate of the returned sludge and the discharge flow rate of the residual sludge, calculating the sludge return time required by transportation and the running time of a sludge residual pump by calculating the residual amount of the activated sludge, and then calculating the relation analysis between the residual amounts of the activated sludge in the single tank according to the existing aeration intensity, the liquid level, the sampling value of the activated sludge, the flow rate of the returned sludge and the discharge flow rate of the residual sludge, and finally realizing the control of the return flow and the discharge sequence of the residual sludge of each tank; in addition, the problem of accurate calculation of the total amount of the activated sludge under the conditions of liquid level difference, process section difference and the like of each pool can be solved, the detection efficiency is finally improved, the operation is simple, manual operation is not needed, and the labor cost is finally reduced.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A monitoring method of a sewage treatment sludge precise monitoring system is characterized in that the structure of the sewage treatment sludge precise monitoring system is as follows:
comprises more than one CAST pool, an aeration main pipe (2) connected with a blower;
reflux pumps (3) which have the same number with the CAST tanks and are respectively arranged in each CAST tank;
the number of the residual pumps (4) is the same as that of the CAST pools and the residual pumps are respectively arranged in each CAST pool;
liquid level sensors (5) which have the same number with the CAST pools and are respectively arranged in each CAST pool;
sludge concentration detectors (6) which have the same number with the CAST ponds and are respectively arranged in each CAST pond;
a main controller (7) for monitoring the sludge amount in each CAST tank in real time;
wherein the output of the aeration main pipe (2) is respectively connected with a corresponding CAST tank through a single-tank aeration regulating valve (8), the rear end of each single-tank aeration regulating valve (8) is provided with a pressure transmitter (9), the output of each residual pump (4) is connected with an outflow residual sludge main pipeline (10), the outflow residual sludge main pipeline (10) is connected with a residual sludge flowmeter (11), the output of each backflow pump (3) is connected with an outflow backflow sludge main pipeline (12), the outflow backflow sludge main pipeline (12) is connected with a backflow sludge flowmeter (13), each outflow residual sludge main pipeline (10) is also connected with a first branch pipeline (14) which is respectively communicated with other CAST tanks, each outflow backflow sludge main pipeline (12) is also connected with a second branch pipeline (15) which is respectively communicated with other CAST tanks, the air blower, the reflux pump (3), the residual pump (4), the liquid level sensor (5), the sludge concentration detector (6), the pressure transmitter (9), the single-tank aeration regulating valve (8), the residual sludge flowmeter (11) and the reflux sludge flowmeter (13) are in signal connection with the main controller (7) to calculate the residual total amount of the activated sludge in the single tank according to the aeration intensity, the liquid level, the activated sludge sampling value, the reflux sludge flow and the residual sludge discharge flow, realize the sequencing of a sludge transfer priority queue according to the total amount of the activated sludge obtained by calculation, discharge the sludge into other CAST tanks, and finally control the sequence of the reflux and the residual sludge discharge of each tank body;
an online monitoring instrument (16) for monitoring the pressure at the front end of the aeration disc of the single tank is connected to the aeration regulating valve (8) of the single tank, and the online monitoring instrument (16) is connected with the main controller (7);
the liquid level sensor (5) is positioned at the bottom of the CAST pool;
an electronic valve (17) is arranged on the reflux pump (3);
the monitoring method is carried out by adopting the precise sludge monitoring system for sewage treatment, and specifically comprises the following steps:
A. setting a sludge concentration MLSSset value and a sludge age SRT value of a current single pool according to the temperature, the season and the historical process conditions of each plant;
B. firstly, detecting the pressure value at the rear end of each single-tank aeration regulating valve (8) by a pressure transmitter (9) arranged at the rear end of each single-tank aeration regulating valve (8), and expressing the pressure value by Pn;
C. then detecting the sludge concentration of each tank by a sludge concentration detector (6) arranged in each CAST tank, and expressing the sludge concentration by MLSSn;
D. the liquid level value of the liquid level of each tank is detected by a liquid level sensor (5) arranged in each CAST tank and is expressed by Leveln; then calculating the differential pressure of the aeration disc through the obtained liquid level in the CAST tank and the front end pressure of the aeration disc, comparing the visual perception intensity of on-site aeration, and recording the corresponding differential pressure values of different aeration intensities in real time;
E. a Stepn value is predefined by a master controller to be used as the processing stage condition of each CAST pool process at present; the Stepn value is obtained by automatic calculation according to the process treatment sequence of each tank and the process treatment duration of each tank, and the sludge amount of each CAST tank in unit area is monitored in real time and is expressed by Mudn;
F. when Stepn is an aeration stage and Pn-level is greater than Pnset, the aeration intensity reaches a set value, at the moment, Mudn is MLSSn multiplied by level divided by 5.0, wherein 5.0 is the calculated aeration full pool liquid level, and Pnset is a preset value of the full aeration pressure difference set by an operator according to the actual visual perception aeration intensity of each pool;
G. judging the Mudn value in each pool in real time, and starting a reflux pump (3) and a residual pump (4) of the pool to realize reflux transfer sludge and residual sludge discharge when the Mudn > is MLSSset; and when the Mudn is less than MLSSset, stopping the reflux pump (3) and the residual pump (4) of the pond, and stopping the reflux transfer of the sludge and the discharge of the residual sludge.
2. The monitoring method of the sewage treatment sludge precision monitoring system according to claim 1, wherein in step G, when the multiple tanks meet the requirement of allowing backflow or residual discharge, the Mudn values of the tanks are compared, then the Mudn values of the tanks are sorted from large to small, and then the operation of preferential backflow is performed according to the order from large to small.
3. The monitoring method of the sewage treatment sludge precise monitoring system according to claim 1 or 2, characterized in that the following steps are added after the step G:
H. comparing the total amount of the activated sludge in the pool allowed to flow back or be discharged in surplus with the concentration of the activated sludge of a set target in real time, calculating the sigma Mudn value of the total amount of the sludge, obtaining the flow rate Qs of a surplus pump (4), and then calculating the sludge discharge time of the surplus sludge according to the following formula:
ts ═ Sigma (Mudn × Sn)) + -Qs ÷ SRT ÷ Ns, Ns is the number of simultaneously remaining sludge discharge ponds, and Sn is the area of each pond.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1837088A (en) * | 2006-04-20 | 2006-09-27 | 上海昊沧系统控制技术有限责任公司 | Gas distribution adjustment method for blast aeration system |
| CN202808469U (en) * | 2012-06-26 | 2013-03-20 | 广州市新之地环保产业有限公司 | Intelligent sludge return control device |
| CN206232585U (en) * | 2016-11-22 | 2017-06-09 | 大连大开污水处理有限公司 | A kind of sludge concentration control device |
| CN206538258U (en) * | 2017-02-22 | 2017-10-03 | 唐山首钢京唐西山焦化有限责任公司 | A kind of control device of step feed technology |
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- 2019-01-17 CN CN201910042308.5A patent/CN109534494B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1837088A (en) * | 2006-04-20 | 2006-09-27 | 上海昊沧系统控制技术有限责任公司 | Gas distribution adjustment method for blast aeration system |
| CN202808469U (en) * | 2012-06-26 | 2013-03-20 | 广州市新之地环保产业有限公司 | Intelligent sludge return control device |
| CN206232585U (en) * | 2016-11-22 | 2017-06-09 | 大连大开污水处理有限公司 | A kind of sludge concentration control device |
| CN206538258U (en) * | 2017-02-22 | 2017-10-03 | 唐山首钢京唐西山焦化有限责任公司 | A kind of control device of step feed technology |
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