CN104370313B - A kind of sewage-treatment plant based on mechanical recompression technology - Google Patents
A kind of sewage-treatment plant based on mechanical recompression technology Download PDFInfo
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- CN104370313B CN104370313B CN201410612540.5A CN201410612540A CN104370313B CN 104370313 B CN104370313 B CN 104370313B CN 201410612540 A CN201410612540 A CN 201410612540A CN 104370313 B CN104370313 B CN 104370313B
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- 238000005516 engineering process Methods 0.000 title claims abstract description 33
- 239000010865 sewage Substances 0.000 title claims abstract description 26
- 238000011282 treatment Methods 0.000 title claims abstract description 25
- 238000001704 evaporation Methods 0.000 claims abstract description 58
- 230000008020 evaporation Effects 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 238000013461 design Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 8
- 238000009835 boiling Methods 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 4
- 230000010365 information processing Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 125000004122 cyclic group Chemical group 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/041—Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
Abstract
A kind of sewage-treatment plant based on mechanical recompression technology, the device includes separator, evaporating heat exchanger, circulating pump, feed pump, vavuum pump, compressor and condensate pump；The device is additionally provided with control system, described control system includes that PLC control stations, PLC control stations are connected with by control line with touch-screen and I/O expansion modules, and I/O expansion modules are connected by vacuum breaker of the holding wire respectively with steam control valve, circulating pump, compressor, condensate pump, the charging regulating valve of feed pump, vavuum pump.Apparatus of the present invention reasonable in design, it is workable, sewage disposal can be effectively realized；The state of a control of real unattended duty can be accomplished according to evaporation capacity come self-regulation motor frequency and inlet amount, realized and automatically controlled, the technology such as can be automatically adjusted by dynamic equilibrium, frequency has realized the target of energy-saving and emission-reduction.
Description
Technical field
The present invention relates to a kind of sewage-treatment plant, particularly a kind of sewage disposal dress based on mechanical recompression technology
Put.
Background technology
Current function of mechanical steam recompression sewage treatment control system mainly for the industrial wastewater of chemical plant emission at
Reason.The processing unit common at present energy huge with consumption is required for, is unfavorable for energy saving.Development high efficiency, low at present
The evaporation process technology of pollution has very big necessity.
Function of mechanical steam recompression is that, by compressor second compression again, temperature, pressure value are improved, heat by the steam of single effect evaporation
Enthalpy increases, subsequently into heat exchanger condensation, to make full use of the latent heat of steam.Produce the Chaoyang that domestic this kind of technology belongs to emerging
Industry, many industrial enterprise because the energy, discharge etc. require must energy-conservation above and all good MVR systems of using effect, can be with
Say that prospect is very wide.
The control of current vapo(u)rization system is controlled manually mainly by experience.
Major defect is：1st, require that difficulty is high for operating personnel, necessary experimental technology must be grasped；
2nd, easily the system failure is caused because operational error；
3rd, cannot self-regulation motor rotating speed, cause energy waste；
4th, unattended operation can not be realized.
The content of the invention
The technical problems to be solved by the invention are directed to the deficiencies in the prior art, there is provided a kind of structure design is more closed
The low a kind of sewage-treatment plant based on mechanical recompression technology of reason, stable efficient, energy consumption.
The technical problems to be solved by the invention are realized by following technical scheme.The present invention is that one kind is based on
The sewage-treatment plant of mechanical recompression technology, is characterized in：
The device includes separator, evaporating heat exchanger, circulating pump, feed pump, vavuum pump, compressor and condensate pump；Institute
The evaporating heat exchanger bottom stated is connected with the feeding pipe being connected with evaporating heat exchanger tube side, and feed pump is located on feeding pipe；
Liquid circulation line is provided between evaporating heat exchanger and separator bottom, circulating pump is located on liquid circulation line；Compressor with
Supply air line is connected, and the other end of supply air line is connected on the middle part of evaporating heat exchanger, the top of evaporating heat exchanger with separate
Liquid back pipe road is connected with before device, evaporating heat exchanger tube side, separator and circulating pump form loop；Separator internal upper part is provided with logical
To the Steam Recovery pipeline of compressor；Supply air line is provided with steam control valve；
Vacuum line is connected with the shell side of evaporating heat exchanger, vavuum pump is located on vacuum line；In evaporating heat exchanger
It is also connected with being provided with condenser pipe on shell side, condensate pump is located on condenser pipe；
The device is additionally provided with control system, and described control system includes PLC control stations, PLC control stations and passes through control
Line is connected with touch-screen and I/O expansion modules, I/O expansion modules by holding wire respectively with steam control valve, circulating pump, compression
Machine, condensate pump, the charging regulating valve of feed pump, the vacuum breaker connection of vavuum pump.
What the technical problems to be solved by the invention can also further be realized by following technical scheme.Above institute
A kind of sewage-treatment plant based on mechanical recompression technology stated, is characterized in：Condensate draining is additionally provided with condenser pipe.
What the technical problems to be solved by the invention can also further be realized by following technical scheme.Above institute
A kind of sewage-treatment plant based on mechanical recompression technology stated, is characterized in：Detection of negative pressure dress is provided with supply air line
Put；Described detection of negative pressure mechanism is arranged at channel bend, is made up of proximity switch, catch and fixing device；It is described close
Switch is installed towards steam direction, and catch is fixedly mounted on the sidepiece of proximity switch by fixing device.
What the technical problems to be solved by the invention can also further be realized by following technical scheme.Above institute
A kind of sewage-treatment plant based on mechanical recompression technology stated, is characterized in：The device utilizes PID control method；System
The vacuum feedback parameter for using evaporating heat exchanger is |input paramete, is used to characterize the current state of evaporating heat exchanger；With vacuum
Degree regulating valve is control actuator, vacuum needed for the service requirement selection control according to system.
What the technical problems to be solved by the invention can also further be realized by following technical scheme.Above institute
A kind of sewage-treatment plant based on mechanical recompression technology stated, is characterized in：The device is by controlling evaporation capacity and charging
The balance of amount realizes even running so that the liquid level in evaporator keeps relative constancy；Enter temperature by measure compressor
Degree and target feed air temperature calculate the frequency values for needing vapour compression machine.
What the technical problems to be solved by the invention can also further be realized by following technical scheme.Above institute
A kind of sewage-treatment plant based on mechanical recompression technology stated, is characterized in：Described PLC control stations are set using modularization
Meter, mainly includes following functions block：System initialization module, signal acquisition, processing module, system control module, information reception,
Sending module, and alarm information processing module.
What the technical problems to be solved by the invention can also further be realized by following technical scheme.Above institute
A kind of sewage-treatment plant based on mechanical recompression technology stated, is characterized in：Described PLC control stations use network interface
Communicated with host computer, and the key message of unit is sent to administrator computer；System I/O expansion modules include two
AI inputs, DI inputs, a DO outputs and an AO outputs.
In apparatus of the present invention, the control core of control system is exactly boiling in evaporating heat exchanger.Steam control valve open to
Lead in evaporating heat exchanger and be steam heated to design temperature, open vavuum pump and by adjusting vacuum breaker so that vacuum is constant
In setting value or so.Now liquid comes to life in evaporating heat exchanger, and the steam for producing that seethes with excitement is partly into separator cooling
Condensed water is produced, other compress through compressor, pressure, temperature are raised, liquid is heated into evaporating heat exchanger makes it keep boiling
Rise.So evaporating heat exchanger and separator just constitute a cyclic process for dynamic equilibrium.Control system ensures evaporation and heat-exchange
The temperature of device, vacuum, liquid level relative constancy.Vapor (steam) temperature that the frequency of compressor then comes according to evaporating heat exchanger is controlled
System, it is ensured that the temperature of compressor outlet is constant.System can steady operation, while power consumption is greatly decreased.
The control software that the present invention is used can use module design, take Open-closed-loop to be combined and controlled with fuzzy etc.
System strategy.For ease of test adjustment, ECU also leaves communication port and is communicated with outer computer, can be by computer
Control command is set or computer is transferred data to, in order to data storage, treatment and analysis.
The present invention from programmable control module PLC control, its integrated level is high, reliable in quality, advanced technology, extension side
Just, there is provided industrial bus and network communication interface, easily can be connected with computer, touch-screen and other industry control smart machines
Connect, completed to the measurement of the signals such as each temperature, pressure, flow and to production equipments such as regulating valve, motors by touch-screen
Control task.PLC is contacted by industrial field bus with main control station, completes whole control process.
The present invention uses evaporating heat exchanger vacuum automatic adjustment technology, using PID control technology, is obtained by field test
Go out project data, draw correlation formula and control algolithm.It is |input paramete that system uses the vacuum feedback parameter of evaporator, is used
To characterize the current state of evaporator；It is control actuator with vacuum regulating valve, the service requirement selection control according to system
Required vacuum.Because the speed of vavuum pump vacuum is much slower than the speed for entering evaporator compared with air, pid parameter is not
Different parameters are used when with process difference error amount.Ensure that evaporator can obtain the vacuum of relative constancy, whole system
System even running.
Apparatus of the present invention use dynamic balance control technique, and system operation must steadily control the flat of evaporation capacity and inlet amount
Weighing apparatus so that the liquid level in evaporator keeps relative constancy.Also need to consider that charging can not be delivered once too much during this, lead
In induced evaporation tank below temperature drop to boiling point.Calculated by the intake air temperature and target feed air temperature that measure vapour compression machine
Need the frequency values of vapour compression machine.The energy balance in vaporization cycle is maintained during this, it is ensured that on the premise of evaporation effect
The minimum electric energy of consumption.Material, energy are in the state of relative equilibrium in evaporator in control process, realize the steady of processing procedure
It is qualitative.
Vapour compression machine low power consumpting state of the present invention automatically resets technology.Filled by the detection of negative pressure for detecting supply air line
Put to judge system whether in low power consumpting state（Compressor is actual in surge）If, be in low power consumpting state, represent because
Pedal system cannot not carry out normal process to steam in evaporator.By controlling vacuum regulating valve, vacuum is improved 10%（Should
Value is adjustable）.Judge afterwards after a time, if not recovering normal compressive state still, liquid is heated to steam is led in evaporator
Body so that system recovers normal compressive state., by that can be moved by direction as shown after compressor, now catch can be to the left for steam
Motion.If because producing surge without enough steam, air-flow can be moved compressor to opposite direction, and catch is leaned under airflow function
Nearly proximity switch.The device sends signal to system, and display system is in low power consumpting state.
Compared with prior art, advantages of the present invention and technique effect are as follows：
（1）Apparatus of the present invention reasonable in design, it is workable, sewage disposal can be effectively realized；
（2）Apparatus of the present invention can accomplish real nothing according to evaporation capacity come self-regulation motor frequency and inlet amount
The state of a control of people's post, realizes and automatically controls.
（3）Apparatus of the present invention such as can automatically adjust at the target that technology realizes energy-saving and emission-reduction by dynamic equilibrium, frequency.
（4）The present invention uses compressor safety control technology, realizes to the safe and stable control of apparatus system.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the invention；
Fig. 2 is the control schematic block diagram of control system of the invention；
Fig. 3 is the structural representation of negative-pressure detection device.
Specific embodiment
Referring to the drawings, concrete technical scheme of the invention is further described, is entered in order to those skilled in the art
One step ground understands the present invention, without constituting the limitation to its right.
Embodiment 1, reference picture 1-2, a kind of sewage-treatment plant based on mechanical recompression technology：
The device includes separator 6, evaporating heat exchanger 1, circulating pump 2, feed pump 12, vavuum pump 10, compressor 5 and condensation
Water pump 11；The described bottom of evaporating heat exchanger 1 is connected with the feeding pipe being connected with the tube side of evaporating heat exchanger 1, and feed pump 12 sets
On feeding pipe；Liquid circulation line 3 is provided between evaporating heat exchanger 1 and the bottom of separator 6, circulating pump 2 is located at liquid and follows
On endless tube road 3；Compressor 5 is connected with supply air line 8, and the other end of supply air line 8 is connected on the middle part of evaporating heat exchanger 1,
Liquid back pipe road 7, the tube side of evaporating heat exchanger 1, separator 6 and circulating pump are connected with before the top of evaporating heat exchanger 1 and separator 6
2 form loop；The internal upper part of separator 6 is provided with the Steam Recovery pipeline 4 for leading to compressor 5；Supply air line 8 is provided with steam regulation
Valve；
Vacuum line 9 is connected with the shell side of evaporating heat exchanger 1, vavuum pump 10 is located on vacuum line 9；In evaporation and heat-exchange
It is also connected with being provided with condenser pipe 14 on the shell side of device 1, condensate pump 11 is located on condenser pipe 14；
The device is additionally provided with control system, and described control system includes PLC control stations, PLC control stations and passes through control
Line is connected with touch-screen and I/O expansion modules, I/O expansion modules by holding wire respectively with steam control valve, circulating pump 2, pressure
Contracting machine 5, condensate pump 11, the charging regulating valve of feed pump 12, the vacuum breaker connection of vavuum pump 10.
Embodiment 2, in a kind of sewage-treatment plant based on mechanical recompression technology described in embodiment 1：In condenser pipe
Condensate draining 13 is additionally provided with road 14.
Embodiment 3, in a kind of sewage-treatment plant based on mechanical recompression technology described in embodiment 1 or 2：In supply
Pipeline 8 is provided with negative-pressure detection device；Described detection of negative pressure mechanism is arranged at channel bend, by proximity switch 82, catch
81 and fixing device 83 constitute；The proximity switch 82 is installed towards steam direction, and catch 81 is fixedly mounted by fixing device 83
In the sidepiece of proximity switch 82.
Embodiment 4, a kind of sewage-treatment plant based on mechanical recompression technology described in embodiment 1-3 any one
In：The device utilizes PID control method；It is |input paramete that system uses the vacuum feedback parameter of evaporating heat exchanger, to table
Levy the current state of evaporating heat exchanger；It is control actuator with vacuum regulating valve, the service requirement selection control according to system
Required vacuum.
Embodiment 5, a kind of sewage-treatment plant based on mechanical recompression technology described in embodiment 1-4 any one
In：The device realizes even running by controlling the balance of evaporation capacity and inlet amount so that the liquid level in evaporator keeps phase
To constant；The frequency values for needing vapour compression machine are calculated by the intake air temperature and target feed air temperature that measure compressor.
Embodiment 6, a kind of sewage-treatment plant based on mechanical recompression technology described in embodiment 1-5 any one
In：Described PLC control stations use modularized design, mainly include following functions block：System initialization module, signal acquisition,
Processing module, system control module, information is received, sending module, and alarm information processing module.
Embodiment 7, a kind of sewage-treatment plant based on mechanical recompression technology described in embodiment 1-6 any one
In：Described PLC control stations are communicated using network interface with host computer, and the key message of unit is sent to keeper
Computer；System I/O expansion modules include two AI inputs, DI inputs, a DO outputs and an AO outputs.
Claims (3)
1. a kind of sewage-treatment plant based on mechanical recompression technology, it is characterised in that：
The device includes separator, evaporating heat exchanger, circulating pump, feed pump, vavuum pump, compressor and condensate pump；Described
Evaporating heat exchanger bottom is connected with the feeding pipe being connected with evaporating heat exchanger tube side, and feed pump is located on feeding pipe；Evaporation
Liquid circulation line is provided between heat exchanger and separator bottom, circulating pump is located on liquid circulation line；Compressor and supply
Pipeline is connected, and the other end of supply air line is connected on the middle part of evaporating heat exchanger, the top and separator of evaporating heat exchanger it
Before be connected with liquid back pipe road, evaporating heat exchanger tube side, separator and circulating pump form loop；Separator internal upper part is provided with and leads to pressure
The Steam Recovery pipeline of contracting machine；Supply air line is provided with steam control valve；
Vacuum line is connected with the shell side of evaporating heat exchanger, vavuum pump is located on vacuum line；In the shell side of evaporating heat exchanger
On be also connected with being provided with condenser pipe, condensate pump is located on condenser pipe；
The device is additionally provided with control system, described control system include PLC control stations, PLC control stations with by control line with
Touch-screen and I/O expansion modules are connected, I/O expansion modules by holding wire respectively with steam control valve, circulating pump, compressor,
Condensate pump, the charging regulating valve of feed pump, the vacuum breaker connection of vavuum pump；
The device realizes even running by controlling the balance of evaporation capacity and inlet amount so that the liquid level in evaporator keeps phase
To constant；The frequency values for needing vapour compression machine are calculated by the intake air temperature and target feed air temperature that measure compressor；
The control core of control system is exactly boiling in evaporating heat exchanger；Steam control valve is opened to logical steam in evaporating heat exchanger
Design temperature is heated to, vavuum pump is opened and by adjusting vacuum breaker so that vacuum is constant in setting value；Now evaporate
Liquid comes to life in heat exchanger, and the steam for producing that seethes with excitement is partly into separator cooling and produces condensed water, and other are compressed
Machine is compressed, and pressure, temperature are raised, and liquid is heated into evaporating heat exchanger makes it keep boiling；So evaporating heat exchanger and point
A cyclic process for dynamic equilibrium is just constituted from device；Control system ensures temperature, vacuum, the liquid level phase of evaporating heat exchanger
To constant；The vapor (steam) temperature that the frequency of compressor then comes according to evaporating heat exchanger is controlled, it is ensured that the temperature of compressor outlet
It is constant；
Condensate draining is additionally provided with condenser pipe；
Negative-pressure detection device is provided with supply air line；Described detection of negative pressure mechanism is arranged at channel bend, is opened by close
Close, catch and fixing device are constituted；The proximity switch is installed towards steam direction, and catch is fixedly mounted on by fixing device and connect
The sidepiece of nearly switch；
The device utilizes PID control method；It is |input paramete that system uses the vacuum feedback parameter of evaporating heat exchanger, to table
Levy the current state of evaporating heat exchanger；It is control actuator with vacuum regulating valve, the service requirement selection control according to system
Required vacuum.
2. a kind of sewage-treatment plant based on mechanical recompression technology according to claim 1, it is characterised in that：It is described
PLC control stations use modularized design, mainly include following functions block：System initialization module, signal acquisition, treatment mould
Block, system control module, information is received, sending module, and alarm information processing module.
3. a kind of sewage-treatment plant based on mechanical recompression technology according to claim 1, it is characterised in that：It is described
PLC control stations communicated with host computer using network interface, and the key message of unit is sent to administrator computer；
System I/O expansion modules include two AI inputs, DI inputs, a DO outputs and an AO outputs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410612540.5A CN104370313B (en) | 2014-11-05 | 2014-11-05 | A kind of sewage-treatment plant based on mechanical recompression technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410612540.5A CN104370313B (en) | 2014-11-05 | 2014-11-05 | A kind of sewage-treatment plant based on mechanical recompression technology |
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| CN104370313A CN104370313A (en) | 2015-02-25 |
| CN104370313B true CN104370313B (en) | 2017-07-11 |
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| CN104848284B (en) * | 2015-04-09 | 2017-05-17 | 宜诺珐玛（天津）科技有限公司 | Steam condensation water heat recovery method and device |
| CN107918345A (en) * | 2016-10-08 | 2018-04-17 | 航天晨光股份有限公司 | A kind of nuclear power MVR automation control systems and its control method |
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| CN102557171B (en) * | 2012-01-18 | 2013-05-08 | 深圳市百斯特环保工程有限公司 | Method and system for treating nano-filtration concentrated liquor of landfill leachate |
| CN202440401U (en) * | 2012-01-20 | 2012-09-19 | 安纳社环保工程（苏州）有限公司 | Anti-scaling disposal system for concentrating high-concentrated seawater into saturated bittern |
| CN203428931U (en) * | 2013-07-24 | 2014-02-12 | 深圳市捷晶能源科技有限公司 | Concentration and crystallization equipment for ammonium chloride |
| CN203577339U (en) * | 2013-11-11 | 2014-05-07 | 广州汉泰环境技术有限公司 | Mechanical vapor recompression type evaporation and concentration device |
| CN104058475B (en) * | 2014-07-11 | 2015-08-05 | 成都华西堂投资有限公司 | A kind of heat pump distillation deamination new energy-saving process |
| CN104056462B (en) * | 2014-07-11 | 2015-08-05 | 成都华西堂投资有限公司 | A kind of heat pump distillation energy saver |
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