CN110104720A - A kind of control method of landfill leachate macroporous resin adsorption treatment process - Google Patents
A kind of control method of landfill leachate macroporous resin adsorption treatment process Download PDFInfo
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- CN110104720A CN110104720A CN201910452261.XA CN201910452261A CN110104720A CN 110104720 A CN110104720 A CN 110104720A CN 201910452261 A CN201910452261 A CN 201910452261A CN 110104720 A CN110104720 A CN 110104720A
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
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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
- C02F2209/005—Processes using a programmable logic controller [PLC]
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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
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
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- Organic Chemistry (AREA)
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- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
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Abstract
A kind of control method of landfill leachate macroporous resin adsorption treatment process, belongs to water treatment field.This method obtains the corresponding instantaneous COD concentration of online absorbance by measurement landfill leachate absorbance；(1) according to the total amount and flow of inlet water relation equation of macroporous resin adsorption COD saturation, flow of inlet water is acquired, PLC automatic controller output signal, real-time control landfill leachate flow of inlet water are passed through；(2) certain production requirements are directed to, flow of inlet water size can not be adjusted, so the COD total amount adsorbed according to macroreticular resin and instantaneous COD concentration relationship equation, obtain the saturated adsorption time that macroreticular resin reaches the total amount Q of macroporous resin adsorption COD saturation, by PLC automatic controller output signal, controls landfill leachate and be saturated adsorption cycle.This method solve macroporous resin adsorption performances to be fully utilized, and is saturated the problem of adsorption cycle confusion.
Description
Technical field
The present invention relates to a kind of water treatment fields, and in particular to a kind of landfill leachate macroporous resin adsorption treatment process
Control method.
Background technique
Resin influent quality (such as COD) may cause the resin adsorption period there may be larger fluctuation (normal phenomenon)
It is unstable (if water water quality is excessively high, to will lead to adsorption cycle and shorten；If water water quality is too low, arrival setting week will lead to
Resin is still unsaturated after phase, cannot make full use of resin adsorption performance), how to solve the problems, such as this, becomes resin adsorption design
One of with the major issue of operation.
In traditional design mode, this problem is only solved by way of according to the design of peak value water quality, then
Run according to the fixed cycle, there are problems that two in this way: 1, resin adsorption performance is not utilized completely, causes investment and economy
Property is bad, while regeneration liquid waste concentration is low, causes regeneration treatment increased costs；2, section time water when can also have actual motion
Matter is more than design value, so that resin in the setting cycle of operation is caused to be saturated in advance, effluent quality problem not up to standard, and need again
Adsorption cycle is set, causes operation chaotic, regenerated liquid problem can not be handled.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of controlling parties of landfill leachate macroporous resin adsorption treatment process
Method, this method are a kind of in resin adsorption treatment process, controlling landfill leachate flow of inlet water or being saturated adsorption cycle
A kind of method.Solving macroporous resin adsorption performance cannot be fully utilized, and the problem of adsorption cycle confusion is saturated, according in generation
The reason of stating problem: (1) cannot detect water water quality indicator in advance, and absorption cannot be adjusted flexibly in (2) according to resin adsorption capacity
And the regeneration period.Method of the invention carries out flow of inlet water or saturation absorption by being provided with on-line monitoring water quality absorbance
Periodic adjustment.
A kind of control method of landfill leachate macroporous resin adsorption treatment process of the invention, comprising the following steps:
Step 1: measuring the instantaneous COD concentration of landfill leachate
On-line monitoring absorbance is carried out to the water inlet water sample of landfill leachate to be treated, according to absorbance and instantaneously
The relation equation of COD concentration obtains the corresponding instantaneous COD concentration of online absorbance；
Wherein, the water inlet water sample of the landfill leachate of monitoring is tail water of the landfill leachate after biochemical treatment or through pipe
Clear liquid after formula hyperfiltration treatment, COD concentration range is in 300~2000mg/L；
Wherein, the relation equation of absorbance and instantaneous COD concentration are as follows:
Y=9578.8X-27.199；
In formula, Y is instantaneous COD concentration, unit mg/L；X is absorbance, dimensionless；
Step 2: control flow of inlet water or saturation adsorption cycle
(1) method of flow of inlet water is controlled
According to the total amount and flow of inlet water relation equation of macroporous resin adsorption COD saturation, flow of inlet water is acquired, by that can compile
Journey logic controller (PLC) output signal, real-time control landfill leachate flow of inlet water；
Specific control method is as follows: firstly, the instantaneous COD concentration of the landfill leachate influent quality obtained by step 1；
Then the signal for expressing instantaneous COD concentration is delivered in programmable logic controller (PLC) (PLC), passes through macroporous resin adsorption COD
The total amount of saturation and the relation equation of flow of inlet water obtain the signal of expression flow of inlet water；It is adjusted by the signal of flow of inlet water
The aperture for saving water inlet end flow valve, to control flow of inlet water；
Wherein, the total amount and flow of inlet water relation equation of macroporous resin adsorption COD saturation are as follows: Q=q × Y × t；
In above formula, Q is the total amount of macroporous resin adsorption COD saturation, unit kg；Q is flow of inlet water, unit L/h；Y
For instantaneous COD concentration, unit mg/L；T is full conjunction adsorption cycle, unit h；
The total amount of the macroporous resin adsorption COD saturation is determined according to macroreticular resin adsorption property itself；
The full conjunction adsorption cycle is the definite value determined according to production requirement；
The relation equation of comprehensive absorbance and instantaneous COD concentration, corresponding flow of inlet water q equation are answered are as follows:
In formula, Q is the total amount of macroporous resin adsorption COD saturation, unit kg；Q is flow of inlet water, unit L/h；X is
Absorbance, dimensionless；T is full conjunction adsorption cycle, unit h；
(2) method of control saturation adsorption cycle
For certain production requirements, flow of inlet water size can not be adjusted, so total according to the COD that macroreticular resin has adsorbed
Amount and instantaneous COD concentration relationship equation obtain the saturation absorption that macroreticular resin reaches the total amount Q of macroporous resin adsorption COD saturation
Time controls landfill leachate and is saturated adsorption cycle by programmable logic controller (PLC) (PLC) output signal；
Specific control method is as follows: firstly, the instantaneous COD concentration of the landfill leachate influent quality obtained by step 1；
Then the signal for expressing instantaneous COD concentration is delivered in programmable logic controller (PLC) (PLC), has been adsorbed by macroreticular resin
COD total amount and instantaneous COD concentration relationship equation, obtain the amount for the COD that current macroreticular resin has adsorbed, when macroreticular resin
When COD amount through adsorbing reaches the total amount Q of macroporous resin adsorption COD saturation, output control flow valve opening and closing signal passes through stream
Valve opening and closing signal is measured to close one end of the flow valve connection saturation macroporous resin adsorption column of water inlet end setting, meanwhile, it opens
It opens flow valve and connects one end of another macroporous resin adsorption column, to control saturation adsorption cycle；
Wherein, the COD total amount and instantaneous COD concentration relationship equation that the macroreticular resin has adsorbed are as follows:
Qi=∑ qYi·ti
In above formula, QiFor the COD total amount that macroreticular resin has adsorbed, unit kg；Q is flow of inlet water, unit L/h；Yi
For tiWhen instantaneous COD concentration, unit mg/L；tiTo detect interval time, unit h every time；I be 1,2,3,4,
5……；
The total amount Q of the macroporous resin adsorption COD saturation is determined according to macroreticular resin adsorption property itself；
The flow of inlet water is the definite value determined according to production requirement；
Comprehensive absorbance and instantaneous COD concentration relationship equation are saturated equation corresponding to adsorption cycle and answer are as follows:
Qi=∑ qYi·ti=∑ q (9578.8Xi-27.199)·ti
In formula, QiFor the COD total amount that macroreticular resin has adsorbed, unit kg；Q is flow of inlet water, unit L/h；YiFor
tiWhen instantaneous COD concentration, unit mg/L；XiFor tiThe absorbance of Shi Jinshui, dimensionless；tiFor detect every time interval when
Between, unit h；I is 1,2,3,4,5 ...；
Work as QiWhen=Q, i.e., resin reaches saturation, is saturated adsorption cycle t=t1+t2+t3+…+ti。
In the step 1, the relation equation of water quality absorbance and water-quality COD concentration specifically:
The reason of yellow is presented in landfill leachate biochemical tail water water sample to be treated, and yellow occurs is due to having in water
Caused by the accumulation of machine object therefore external presentation by repeated detection, analysis, verifying, obtains relationship side at 577nm wavelength
Journey: Y=9578.8X-27.199；
Wherein, in formula, Y is COD concentration, unit mg/L；X is landfill leachate absorbance, dimensionless.
In the step 2 (1), the flow valve is preferably electromagnetic flow valve.
In the step 2 (2), the flow valve can be threeway electromagnetic flow valve, threeway electromagnetic flow valve point
It Lian Jie not water inlet end, the first macroporous resin adsorption column, the second macropore resin absorbing column.
In the step 2 (2), after the macroporous resin adsorption column after saturation is regenerated, recycling.
A kind of control method of landfill leachate macroporous resin adsorption treatment process of the invention, principle are as follows: macropore tree
The total amount (Q) of rouge CO absorption D saturation is definite value, according to real production requirement, is saturated adsorption cycle (t) or flow of inlet water (q) is
Design definite value.Hence, it can be determined that the relationship of flow of inlet water (q) or saturation adsorption cycle (t) and instantaneous COD concentration (Y).According to
This relationship sets curve, to achieve the purpose that through COD feedback control flow or saturation period.
The COD concentration of landfill leachate is determined by absorbance, can avoid COD on-line monitoring equipments most of on the market
It not can be removed solution middle and high concentration chloride ion interference, lead to the problem that COD measured value is more higher than actual value；Meanwhile the present invention examines
Survey is time-consuming short, and cost of investment is small, measures relatively accurate, satisfaction control requirement.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail.
In following embodiment, the PLC of use is commercially available box-type minicomputer, in the embodiment of the present invention, using with
One of lower PLC type number: Siemens's S7-200 type, Japanese Toshiba EX-plus type, 5/10 type of American AB.
Embodiment 1
A kind of control method of landfill leachate macroporous resin adsorption treatment process, comprising the following steps:
Step 1:
Before device operation, parameter request is programmed into instantaneous COD concentration module and programmable logic controller (PLC) (PLC) in advance
It is interior；
To landfill leachate to be treated water inlet water sample carry out on-line monitoring absorbance, will on-line monitoring absorbance as
Input signal is input in instantaneous COD concentration module, according to the linear relationship of absorbance and instantaneous COD concentration, is inhaled online
The corresponding instantaneous COD concentration of luminosity；
Wherein, landfill leachate water inlet water sample is tail water of the landfill leachate after biochemical treatment；Its COD concentration range is
1000-1500mg/L；
The relation equation of absorbance and instantaneous COD concentration are as follows:
Absorbance and COD relation curve are as follows:
Y=9578.8X-27.199；
In formula, Y is instantaneous COD concentration, unit mg/L；X is absorbance, dimensionless；
Step 2: control flow of inlet water
The signal of the instantaneous COD concentration of expression obtained in instantaneous COD concentration module is conveyed into programmable logic controller (PLC)
(PLC) in, by the relation equation of the macroporous resin adsorption COD total amount being saturated and flow of inlet water, expression flow of inlet water is obtained
Signal；The aperture of water inlet end electromagnetic flow valve is adjusted by the signal of flow of inlet water, to control flow of inlet water；
Wherein, the total amount and flow of inlet water relation equation of macroporous resin adsorption COD saturation are as follows: Q=q × Y × t；
In above formula, Q is the total amount of macroporous resin adsorption COD saturation, unit kg；Q is flow of inlet water, unit L/h；Y
For instantaneous COD concentration, unit mg/L；T is saturation adsorption cycle, unit h.
The total amount of the macroporous resin adsorption COD saturation is determined according to macroreticular resin adsorption property itself.
The adsorption cycle is the definite value determined according to production requirement.
Step 3, according to spectrophotometer wavelength is set as 577nm, when absorbance is X, corresponding flow of inlet water q is answered
Are as follows:
In formula, Q is the total amount of macroporous resin adsorption COD saturation, unit kg；Q is flow of inlet water, unit L/h；X is
Absorbance, dimensionless；T is full conjunction adsorption cycle, unit h.
Wherein, the total amount of macroporous resin adsorption COD saturation is determined according to macroreticular resin adsorption property itself.
Adsorption cycle is the definite value determined according to production requirement.
By adjusting Electromagnetic Flow valve opening real-time control landfill leachate flow of inlet water.
Embodiment 2
A kind of control method of landfill leachate macroporous resin adsorption treatment process, comprising the following steps:
Step 1:
Before device operation, parameter request is programmed into instantaneous COD concentration module and programmable logic controller (PLC) (PLC) in advance
It is interior；
To landfill leachate to be treated water inlet water sample carry out on-line monitoring absorbance, will on-line monitoring absorbance as
Input signal is input in instantaneous COD concentration module, according to the linear relationship of absorbance and instantaneous COD concentration, is inhaled online
The corresponding instantaneous COD concentration of luminosity；
Wherein, landfill leachate water inlet water sample is the clear liquid after tubular type hyperfiltration treatment；Its COD concentration range is 800-
1200mg/L；
The relation equation of absorbance and instantaneous COD concentration are as follows:
Y=9578.8X-27.199；
In formula, Y is instantaneous COD concentration, unit mg/L；X is absorbance, dimensionless；
Step 2: control saturation adsorption cycle
The signal of the instantaneous COD concentration of expression obtained in instantaneous COD concentration module is delivered into Programmable logical controller
In device (PLC), the COD total amount adsorbed by macroreticular resin and instantaneous COD concentration relationship equation obtain current macroreticular resin
The amount of the COD adsorbed, when the COD amount that macroreticular resin has adsorbed reaches the total amount Q of macroporous resin adsorption COD saturation,
Output control Electromagnetic Flow valve opening and closing signal closes saturation macroporous resin column water inlet by Electromagnetic Flow valve opening and closing signal
Electromagnetic flow valve is held, and opens the valve of another macroporous resin adsorption column, to control saturation adsorption cycle；
Wherein, the COD total amount and instantaneous COD concentration relationship equation that the macroreticular resin has adsorbed are as follows:
Qi=∑ qYi·ti
In above formula, QiFor the COD total amount that macroreticular resin has adsorbed, unit kg；Q is flow of inlet water, unit L/h；Yi
For tiWhen instantaneous COD concentration, unit mg/L；tiTo detect interval time, unit h every time；I be 1,2,3,4,
5……；
The total amount Q of the macroporous resin adsorption COD saturation is determined according to macroreticular resin adsorption property itself.
The flow of inlet water is the definite value determined according to production requirement.
Step 3, comprehensive absorbance and instantaneous COD concentration relationship equation are saturated equation corresponding to adsorption cycle and answer are as follows:
Qi=∑ qYi·ti=∑ q (9578.8Xi-27.199)·ti
In formula, QiFor the COD total amount that macroreticular resin has adsorbed, unit kg；Q is flow of inlet water, unit L/h；YiFor
tiWhen instantaneous COD concentration, unit mg/L；tiTo detect interval time, unit h every time；I is 1,2,3,4,5 ...；X
For tiThe absorbance of Shi Jinshui, dimensionless；
Work as QiWhen=Q, i.e., resin reaches saturation, is saturated adsorption cycle t=t1+t2+t3+…+ti。
Wherein, the total amount Q of macroporous resin adsorption COD saturation is determined according to macroreticular resin adsorption property itself.
Flow of inlet water is the definite value determined according to production requirement.
Landfill leachate saturation adsorption cycle is controlled by the opening and closing of electromagnetic flow valve.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (7)
1. a kind of control method of landfill leachate macroporous resin adsorption treatment process, which comprises the following steps:
Step 1: measuring the instantaneous COD concentration of landfill leachate
On-line monitoring absorbance is carried out to the water inlet water sample of landfill leachate to be treated, it is dense according to absorbance and instantaneous COD
The relation equation of degree obtains the corresponding instantaneous COD concentration of online absorbance；
Wherein, the water inlet water sample of the landfill leachate of monitoring is tail water of the landfill leachate after biochemical treatment or super through tubular type
Filter treated clear liquid, COD concentration range is in 300~2000mg/L；
Wherein, the relation equation of absorbance and instantaneous COD concentration are as follows:
Y=9578.8X-27.199；
In formula, Y is instantaneous COD concentration, unit mg/L；X is absorbance, dimensionless；
Step 2: control flow of inlet water or saturation adsorption cycle
(1) method of flow of inlet water is controlled
According to the total amount and flow of inlet water relation equation of macroporous resin adsorption COD saturation, flow of inlet water is acquired, is patrolled by programmable
Collect controller output signal, real-time control landfill leachate flow of inlet water；
Wherein, the total amount and flow of inlet water relation equation of macroporous resin adsorption COD saturation are as follows: Q=q × Y × t；
In above formula, Q is the total amount of macroporous resin adsorption COD saturation, unit kg；Q is flow of inlet water, unit L/h；Y is wink
When COD concentration, unit mg/L；T is full conjunction adsorption cycle, unit h；
The total amount of the macroporous resin adsorption COD saturation is determined according to macroreticular resin adsorption property itself；
The full conjunction adsorption cycle is the definite value determined according to production requirement；
The relation equation of comprehensive absorbance and instantaneous COD concentration, corresponding flow of inlet water q equation are answered are as follows:
In formula, Q is the total amount of macroporous resin adsorption COD saturation, unit kg；Q is flow of inlet water, unit L/h；X is extinction
Degree, dimensionless；T is full conjunction adsorption cycle, unit h；
(2) method of control saturation adsorption cycle
For certain production requirements, flow of inlet water size can not be adjusted, thus the COD total amount adsorbed according to macroreticular resin and
Instantaneous COD concentration relationship equation obtains the saturated adsorption time that macroreticular resin reaches the total amount Q of macroporous resin adsorption COD saturation,
By programmable logic controller (PLC) output signal, controls landfill leachate and be saturated adsorption cycle；
Wherein, the COD total amount and instantaneous COD concentration relationship equation that the macroreticular resin has adsorbed are as follows:
Qi=∑ qYi·ti
In above formula, QiFor the COD total amount that macroreticular resin has adsorbed, unit kg；Q is flow of inlet water, unit L/h；YiFor ti
When instantaneous COD concentration, unit mg/L；tiTo detect interval time, unit h every time；I is 1,2,3,4,5 ...；
The total amount Q of the macroporous resin adsorption COD saturation is determined according to macroreticular resin adsorption property itself；
The flow of inlet water is the definite value determined according to production requirement；
Comprehensive absorbance and instantaneous COD concentration relationship equation are saturated equation corresponding to adsorption cycle and answer are as follows:
Qi=∑ qYi·ti=∑ q (9578.8Xi-27.199)ti
In formula, QiFor the COD total amount that macroreticular resin has adsorbed, unit kg；Q is flow of inlet water, unit L/h；YiFor tiWhen
Instantaneous COD concentration, unit mg/L；XiFor tiThe absorbance of Shi Jinshui, dimensionless；tiIt is single to detect interval time every time
Position is h；I is 1,2,3,4,5 ...；
Work as QiWhen=Q, i.e., resin reaches saturation, is saturated adsorption cycle t=t1+t2+t3+…+ti。
2. the control method of landfill leachate macroporous resin adsorption treatment process as described in claim 1, which is characterized in that institute
In the step 1 (1) stated, specific control method is as follows: firstly, passing through the instantaneous of the landfill leachate influent quality that step 1 obtains
COD concentration；Then the signal for expressing instantaneous COD concentration is delivered in programmable logic controller (PLC), passes through macroporous resin adsorption
The total amount of COD saturation and the relation equation of flow of inlet water, obtain the signal of expression flow of inlet water；By the signal of flow of inlet water come
The aperture for adjusting water inlet end flow valve, to control flow of inlet water.
3. the control method of landfill leachate macroporous resin adsorption treatment process as described in claim 1, which is characterized in that institute
In the step 1 (2) stated, specific control method is as follows: firstly, passing through the instantaneous of the landfill leachate influent quality that step 1 obtains
COD concentration；Then the signal for expressing instantaneous COD concentration is delivered in programmable logic controller (PLC), by macroreticular resin
The COD total amount of absorption and instantaneous COD concentration relationship equation, obtain the amount for the COD that current macroreticular resin has adsorbed, when macropore tree
When the COD amount that rouge has adsorbed reaches the total amount Q of macroporous resin adsorption COD saturation, output control flow valve opening and closing signal is led to
Inflow-rate of water turbine valve opening and closing signal come close water inlet end setting flow valve connection saturation macroporous resin adsorption column one end, together
When, turn-on flow rate valve connects one end of another macroporous resin adsorption column, to control saturation adsorption cycle.
4. the control method of landfill leachate macroporous resin adsorption treatment process as described in claim 1, which is characterized in that institute
In the step 1 stated, the relation equation of water quality absorbance and water-quality COD concentration specifically:
The reason of yellow is presented in landfill leachate biochemical tail water water sample to be treated, and yellow occurs is due to Organic substance in water
Therefore external presentation caused by accumulation by repeated detection, analysis, verifying, obtains relation equation at 577nm wavelength: Y
=9578.8X-27.199；
Wherein, in formula, Y is COD concentration, unit mg/L；X is landfill leachate absorbance, dimensionless.
5. the control method of landfill leachate macroporous resin adsorption treatment process as described in claim 1, which is characterized in that institute
In the step 2 (1) stated, the flow valve is electromagnetic flow valve.
6. the control method of landfill leachate macroporous resin adsorption treatment process as described in claim 1, which is characterized in that institute
In the step 2 (2) stated, the flow valve is threeway electromagnetic flow valve, and threeway electromagnetic flow valve is separately connected water inlet end, the
One macroporous resin adsorption column, the second macropore resin absorbing column.
7. the control method of landfill leachate macroporous resin adsorption treatment process as described in claim 1, which is characterized in that institute
In the step 2 (2) stated, after the macroporous resin adsorption column after saturation is regenerated, recycling.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111675325A (en) * | 2020-07-22 | 2020-09-18 | 苏州科特环保股份有限公司 | Intelligent anaerobic reactor system and wastewater treatment detection method |
| CN114426374A (en) * | 2020-10-15 | 2022-05-03 | 中国石油化工股份有限公司 | Garbage leachate treatment method |
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