CN105084632B - A kind of salt recovery method of sewage treatment plant - Google Patents
A kind of salt recovery method of sewage treatment plant Download PDFInfo
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- CN105084632B CN105084632B CN201510546436.5A CN201510546436A CN105084632B CN 105084632 B CN105084632 B CN 105084632B CN 201510546436 A CN201510546436 A CN 201510546436A CN 105084632 B CN105084632 B CN 105084632B
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Abstract
The invention discloses a kind of salt recovery systems of sewage treatment plant, including evaporator, evaporator is provided with inlet and outlet, water outlet is connected with raw water and confesses pipeline, the raw water, which is confessed, to be provided with raw water and confesses pump on pipeline, salt recovery system further includes sedimentation basin, supernatant collection pond and centrifuge, the water outlet that raw water confesses pipeline is connected to sedimentation basin, it is communicated with supernatant extraction pipeline between the sedimentation basin and supernatant collection pond and returns liquid dilution pipeline, the supernatant, which extracts pipeline out and goes back to liquid dilution tube road, is respectively arranged with drawing liquid pump and dilution pumps, it is provided with feeding pipe between the bottom of pond of sedimentation basin and the feed inlet of centrifuge, it is provided with liquid back pipe road between the discharge port and supernatant collection pond of centrifuge.The brine is received system and is precipitated first with sedimentation basin, so that salinity is increased, is then re-fed into centrifuge and centrifuges, and such centrifuge, which is not necessarily to open together with evaporator, to stop together, reduces operating cost, the production capacity of centrifuge is also adequately utilized.
Description
Technical field
The present invention relates to a kind of salt recovery system of sewage treatment plant and salt recovery methods, are used for the sewage high to salt content
Pre-treatment.
Background technology
There are many sewage treatment plant's sewage species to be treated, need first to isolate salt again for the larger sewage of salt content
It is sent in treatment tank, not so can increase the difficulty of sewage disposal, it is difficult to qualified discharge.And evaporation installation steams material at present
Discharge method the saliferous raw water of evaporator to centrifuge is directly generally detached into salt with pump, but this mode goes out salt amount
It is few, it is troublesome in poeration, and due to being continuous operation, centrifuge must simultaneously be run with evaporator, cause operating cost very big in this way.
Not high, the low salinity additionally, due to the mixed liquor salinity into centrifuge, leads to the whole yield for not giving full play to the centrifuge.
It is also easy to be influenced salt effect by its fluctuation because evaporator discharge concentration often has fluctuation, when centrifuge being caused to go out salt.Fortune
Special messenger need to be sent to operate continuously when row.
Invention content
The technical problem to be solved by the present invention is to:A kind of salt recovery system of sewage treatment plant is provided, which receives system
System precipitated first with sedimentation basin, so that salinity is increased, be then re-fed into centrifuge and centrifuge, such centrifuge without
It need to together open with evaporator and stop together, reduce operating cost, while the production capacity of centrifuge is also adequately utilized.
Another technical problem to be solved by this invention is:A kind of salt recovery method of sewage treatment plant, the salt are provided
Recovery method simple and reasonable steps improve out the efficiency of salt, save energy consumption.
In order to solve the above technical problems, the technical scheme is that:A kind of salt recovery system of sewage treatment plant, including
Evaporator, the evaporator are provided with inlet and outlet, which is connected with inlet pipeline, and the water outlet is connected with
Raw water confesses pipeline, which, which confesses, is provided with raw water and confesses pump on pipeline, the salt recovery system further includes sedimentation basin, supernatant
Liquid collecting pit and centrifuge, the water outlet that the raw water confesses pipeline are connected to sedimentation basin, the sedimentation basin and supernatant collection pond
Between be communicated with supernatant extraction pipeline and return liquid dilution pipeline, supernatant extraction pipeline and go back to liquid dilution tube road and set respectively
It is equipped with drawing liquid pump and dilution pumps, feeding pipe, feed pipe are provided between the bottom of pond of the sedimentation basin and the feed inlet of centrifuge
Road is provided with feed pump, is provided with liquid back pipe road between the discharge port and supernatant collection pond of the centrifuge, the liquid back pipe
Road is provided with back liquid pump.
As a preferred solution, the salt recovery system further includes intelligent controlling device, is arranged on the sedimentation basin
It is useful for the salt face detection sensor of the salt deposit extreme position after detection precipitation, for detecting supernatant liquid level extreme position
Level detection sensors device and lower level detection sensors device, the diluting salt face detection for detecting the salt deposit extreme position after diluting pass
Sensor, signal input part and salt face detection sensor, upper liquid level detection sensor, the lower level detection of the intelligent controlling device
Sensor and the electrical connection of diluting salt face detection sensor, the output end of the intelligent controlling device and raw water confess pump, drawing liquid pump,
Dilution pumps, feed pump and centrifuge are electrically connected.
As a preferred solution, the drawing liquid pump and dilution pumps are the same water pump, return the water inlet of liquid dilution pipeline
Pipeline section is connected to the water inlet of the water pump, and the water outlet pipeline section for returning liquid dilution pipeline is connected to the water outlet of the water pump, water inlet segment
It is both provided with solenoid valve on water outlet pipeline section, which connect with intelligent controlling device.
As a preferred solution, the water inlet end of the water inlet segment of described time liquid dilution pipeline extends to supernatant collection pond
Bottom of pond.
As a preferred solution, the supernatant collection pond is adjacent with sedimentation basin.
After using above-mentioned technical proposal, effect of the invention is:The salt recovery system is using sedimentation basin come precipitation concentration
Salt will not influence centrifuge when the saliferous raw water of evaporator confesses shakiness, and the salt deposit after precipitation utilizes supernatant dilution
It is sent into centrifuge afterwards, the production capacity of centrifuge is adequately utilized in this way, salt outlet ratio is made to improve, centrifuge does not have to same with evaporator
Shi Yunhang, after the completion of salt layer separation, centrifuge can stop, and reduce operating cost in this way, save energy consumption.
In addition, to solve another technical problem, technical solution provided by the invention is:A kind of salt of sewage treatment plant time
Receiving method includes the following steps:
A, the waste water of saliferous is sent to evaporative crystallization in evaporator;
B, the saliferous raw water after evaporative crystallization, which is confessed to be pumped into sedimentation basin using raw water, precipitates;
C, the bottom of pond deposition in sedimentation basin has salt deposit, is supernatant above rock stratum, is evacuated to supernatant using drawing liquid pump
In clear liquid collecting pit;
D, after the salt deposit in sedimentation basin reaches specified amount, drawing liquid pump stops, and utilizes dilution pumps by supernatant collection pond
In supernatant be pumped into sedimentation basin in be diluted;
F, start centrifuge and the salt deposit in sedimentation basin is pumped into centrifuge using feed pump;
G, the salt derived from the discharge port of centrifuge packs, and the moisture of centrifugation is back in supernatant collection pond, supernatant
Supernatant in collecting pit, which is sent into treatment tank, carries out sewage disposal.
Preferably, described to dilute the supernatant that the supernatant being pumped into is supernatant collection pond bottom of pond.
It is further preferred that being provided with salt face detection sensor, upper liquid level detection sensor, lower liquid level on the sedimentation basin
Detection sensor and diluting salt face detection sensor, the signal input part and salt face detection sensor of the intelligent controlling device,
Upper liquid level detection sensor, lower level detection sensors device and diluting salt face detection sensor are electrically connected, the intelligent control dress
The output end set is confessed pump, drawing liquid pump, dilution pumps, feed pump and centrifuge with raw water and is electrically connected;
When salt face detection sensor, diluting salt face detection sensor, upper liquid level detection sensor and lower level detection sensors
When device does not all detect signal, intelligent controlling device control raw water confesses pump continue working, and saliferous raw water persistently supplies in evaporator
Enter to sedimentation basin, and drawing liquid pump, dilution pumps, feed pump and centrifuge stop;
When salt face, signal is not detected in detection sensor, and upper liquid level detection sensor detects signal, shows sedimentation basin
In supernatant have reached extreme position, the off-capacity but precipitation capacity in sedimentation basin do not reach capacity, at this time intelligence control
Device control drawing liquid pump action processed, brine is confessed pump, dilution pumps, feed pump and centrifuge and is stopped at this time, and liquid level is examined instantly
When signal is not detected in survey sensor, intelligent controlling device, which controls drawing liquid pump, to be stopped, and brine is confessed pump and is again started up;
When salt face, detection sensor detects signal and diluting salt face detection sensor and upper liquid level survey sensor detection
Signal is not detected, intelligent controlling device control raw water confesses pump and stops supply raw water, while starting dilution pumps and receiving supernatant
Collection pond in supernatant be pumped into sedimentation basin until diluting salt face detection sensor detect signal, then start centrifuge,
The salt deposit of high concentration in sedimentation basin is sent into centrifuge and is centrifuged by feed pump, and the water centrifuged simultaneously is sent back to
During clear liquid is collected.
Preferably, the function in the sedimentation basin and supernatant collection pond is used alternatingly, and sedimentation basin is precipitated as salt first, and
Supernatant collection pond is used as supernatant collection, and when the high concentration salt deposit of sedimentation basin is sent into centrifuge and is detached, supernatant is received
Ji Chi is used as sedimentation basin, and raw water confesses pump and saliferous raw water is sent into continuous precipitation in supernatant collection pond, and sedimentation basin is then at this time
As supernatant collection.
After using above-mentioned technical proposal, effect of the invention is:The salt recovery method can improve salt outlet ratio, centrifuge
It only needs to stop after when one section of running at full capacity, without being opened simultaneously with evaporator, reduces energy consumption.In addition centrifuge collection
In detach salt whithin a period of time, it is therefore not necessary to which artificial guard for a long time, has saved labour.
In addition, the brine receiving method of the present invention is capable of the start and stop of each power part of control of intelligence, participated in without artificial, work
Make in stable condition, saving manpower.
Since the function of the sedimentation basin and supernatant collection pond is used alternatingly, first sedimentation basin is precipitated as salt, and supernatant
Liquid collecting pit is used as supernatant collection, and when the high concentration salt deposit of sedimentation basin is sent into centrifuge and is detached, supernatant collection pond
As sedimentation basin, raw water confesses pump and saliferous raw water is sent into continuous precipitation in supernatant collection pond, and sedimentation basin is then used as at this time
Supernatant collection.In this way, while centrifuge detaches salt, saliferous raw water can precipitate in supernatant collection pond, can contract in this way
Short time, and ensure that saliferous raw water is continual and confess collection.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the structural schematic diagram of the embodiment of the present invention;
In attached drawing:1. evaporator;2. raw water confesses pipeline;3. raw water confesses pump;4. sedimentation basin;5. supernatant collection pond;
6. supernatant extracts pipeline out;7. drawing liquid pump;8. feed pump;9. feeding pipe;10. centrifuge;11. liquid back pipe road;12. time liquid
Pump;13. salt face detection sensor;14. lower level detection sensors device;15. diluting salt face detection sensor;Level detection on 16.
Sensor.
Specific implementation mode
Below by specific embodiment, the present invention is described in further detail.
Embodiment 1
As shown in Figure 1, a kind of salt recovery system of sewage treatment plant, including evaporator 1, the evaporator 1 be provided with into
The mouth of a river and water outlet, the water inlet are connected with inlet pipeline, and the water outlet is connected with raw water and confesses pipeline 2, which confesses
It is provided with raw water on pipeline 2 and confesses pump 3, the salt recovery system further includes sedimentation basin 4, supernatant collection pond 5 and centrifuge 10,
The supernatant collecting pit is adjacent with sedimentation basin 4.The water outlet that the raw water confesses pipeline 2 is connected to sedimentation basin 4, the sedimentation basin
It is communicated with supernatant extraction pipeline 6 between 4 and supernatant collection pond 5 and returns liquid dilution pipeline, which extracts pipeline 6 out and return
Liquid dilution tube road is respectively arranged with drawing liquid pump 7 and dilution pumps, between the bottom of pond and the feed inlet of centrifuge 10 of the sedimentation basin 4
It is provided with feeding pipe 9, feed pump 8, discharge port and the supernatant collection pond 5 of the centrifuge 10 are provided on feeding pipe 9
Between be provided with liquid back pipe road 11, be provided with back liquid pump 12 on the liquid back pipe road 11.
In order to realize the intelligence of entire salt recovery system, the salt recovery system further includes intelligent controlling device, described
The salt face detection sensor 13 for detecting the salt deposit extreme position after precipitating is provided on sedimentation basin 4, for detecting supernatant
The upper liquid level detection sensor 16 of liquid level extreme position and lower level detection sensors device 14, for detecting the salt deposit limit after diluting
The diluting salt face detection sensor 15 of position, the signal input part of the intelligent controlling device and salt face detection sensor 13, on
Level detection sensors device 16, lower level detection sensors device 14 and diluting salt face detection sensor 15 are electrically connected, the intelligent control
The output end of device is confessed pump 3, drawing liquid pump 7, dilution pumps, feed pump 8 and centrifuge 10 with raw water and is electrically connected.Wherein, such as Fig. 1
Shown, the relative mounting positions of each sensor are:It is from bottom to top salt face detection sensor 13, lower level detection sensors device successively
14, diluting salt face detection sensor 15, upper liquid level detection sensor 16.The signal that intelligent controlling device is detected according to each sensor
It combines to control different working conditions.
Preferably, the drawing liquid pump 7 and dilution pumps are the same water pump, and the water inlet segment for returning liquid dilution pipeline is connected to this
The water inlet of water pump, the water outlet pipeline section for returning liquid dilution pipeline are connected to the water outlet of the water pump, water inlet segment and are discharged on pipeline section
It is both provided with solenoid valve, which connect with intelligent controlling device, can save a pump in this way, reach the mesh for reducing cost
, drawing liquid may be implemented using the opening and closing combination of a water pump and solenoid valve or dilution acts.Described time liquid dilutes pipeline
The water inlet end of water inlet segment extends to the bottom of pond in supernatant collection pond 5.Although supernatant collection pond 5 is to collect supernatant, place
Salt concentration is relatively high in the supernatant of bottom of pond, and therefore, the salt deposit effect that sedimentation basin 4 is diluted with the supernatant of bottom of pond is more preferable.
The salt recovery system using sedimentation basin 4 come precipitation concentration salt, when the saliferous raw water of evaporator 1 confesses shakiness
Centrifuge 10 is not interfered with, the salt deposit after precipitation is adequately utilized in this way using being sent into centrifuge 10 after supernatant dilution
The production capacity of centrifuge 10, makes salt outlet ratio improve, and centrifuge 10 does not have to run simultaneously with evaporator 1, after the completion of salt layer separation, centrifugation
Machine 10 can stop, and reduce operating cost in this way, save energy consumption.
In addition, to solve another technical problem, technical solution provided by the invention is:A kind of salt of sewage treatment plant time
Receiving method includes the following steps:
A, the waste water of saliferous is sent to evaporative crystallization in evaporator 1;
B, the saliferous raw water after evaporative crystallization confesses pump 3 using raw water and is sent in sedimentation basin 4 and precipitates;
C, the bottom of pond deposition in sedimentation basin 4 has salt deposit, is supernatant above rock stratum, is evacuated to supernatant using drawing liquid pump 7
In supernatant collection pond 5;
D, after the salt deposit in sedimentation basin 4 reaches specified amount, drawing liquid pump 7 stops, and utilizes dilution pumps by supernatant collection
Supernatant in pond 5, which is pumped into sedimentation basin 4, to be diluted;
F, start centrifuge 10 and the salt deposit in sedimentation basin 4 is pumped into centrifuge 10 using feed pump 8;
G, the salt derived from the discharge port of centrifuge 10 packs, and the moisture of centrifugation is back in supernatant collection pond 5, supernatant
Supernatant in liquid collecting pit 5, which is sent into treatment tank, carries out sewage disposal.
Preferably, described to dilute the supernatant that the supernatant being pumped into is 5 bottom of pond of supernatant collection pond.
Salt face detection sensor 13, upper liquid level detection sensor 16, lower level detection sensors are provided on the sedimentation basin 4
Device 14 and diluting salt face detection sensor 15, the signal input part of the intelligent controlling device and salt face detection sensor 13, on
Level detection sensors device 16, lower level detection sensors device 14 and diluting salt face detection sensor 15 are electrically connected, the intelligence control
The output end of device processed is confessed pump 3, drawing liquid pump 7, dilution pumps, feed pump 8 and centrifuge 10 with raw water and is electrically connected;
When salt face detection sensor 13, diluting salt face detection sensor 15, upper liquid level detection sensor 16 and lower liquid level are examined
Survey sensor 14 all without detection signal when, intelligent controlling device control raw water confesses 3 continue workings of pump, saliferous in evaporator 1
Raw water is persistently fed to sedimentation basin 4, and drawing liquid pump 7, dilution pumps, feed pump 8 and centrifuge 10 stop;
When signal is not detected in salt face detection sensor 13, and upper liquid level detection sensor 16 detects signal, shows to sink
Supernatant in shallow lake pond 4 has reached extreme position, and the off-capacity but precipitation capacity in sedimentation basin 4 do not reach capacity, at this time
Intelligent controlling device controls drawing liquid pump 7 and acts, and brine is confessed pump, dilution pumps, feed pump 8 and centrifuge 10 and stopped at this time, and
Instantly when signal is not detected in level detection sensors device 14, intelligent controlling device, which controls drawing liquid pump 7, to be stopped, and brine confesses pump again
Secondary startup;
When salt face detection sensor 13 detects signal and diluting salt face detection sensor 15 and upper liquid level survey sensor inspection
Signal is not detected in survey, and intelligent controlling device control raw water confesses pump 3 and stops supply raw water, while starting dilution pumps by supernatant
Supernatant in liquid collecting pit 5 be pumped into sedimentation basin 4 until diluting salt face detection sensor 15 detect signal, then start
Centrifuge 10, the salt deposit of the high concentration in sedimentation basin 4 is sent into centrifuge 10 and is centrifuged by feed pump 8, and centrifuges simultaneously point
From water send back in supernatant collection again.
Embodiment 2
The present embodiment has done further improvement on the basis of embodiment 1, method of the present embodiment based on embodiment 1,
The function of sedimentation basin 4 and supernatant collection pond 5 is used alternatingly, first sedimentation basin 4 is used to be precipitated as salt, corresponding supernatant collection
Pond 5 is used as supernatant collection, and after the completion of the precipitation of sedimentation basin 4, high concentration salt deposit is sent into centrifuge 10 and is detached, and supernatant
Supernatant discharge in liquid collecting pit 5, then as sedimentation basin 4, raw water confesses pump 3 and send saliferous raw water in supernatant collection pond 5
Enter continuous precipitation in supernatant collection pond 5, and sedimentation basin 4 is then used as supernatant collection at this time, alternately and repeatedly raw water is made to supply in this way
Go out pump 3 not having to shut down, greatly improve the salt rate of recovery with continue working.
Claims (2)
1. a kind of salt recovery method of sewage treatment plant, the salt recovery method with salt recovery system include evaporator, institute
It states evaporator and is provided with inlet and outlet, which is connected with inlet pipeline, and the water outlet is connected with raw water and confesses
Pipeline, which, which confesses, is provided with raw water and confesses pump on pipeline, the salt recovery system further includes sedimentation basin, supernatant collection pond
And centrifuge, the water outlet that the raw water confesses pipeline are connected to sedimentation basin, are connected between the sedimentation basin and supernatant collection pond
There is supernatant extraction pipeline and return liquid dilution pipeline, which, which extracts pipeline out and go back to liquid dilution tube road, is respectively arranged with drawing liquid
Pump and dilution pumps, are provided with feeding pipe, are arranged on feeding pipe between the bottom of pond of the sedimentation basin and the feed inlet of centrifuge
There is feed pump, liquid back pipe road is provided between the discharge port and supernatant collection pond of the centrifuge, liquid back pipe road is arranged
There is back liquid pump;The salt recovery system further includes intelligent controlling device, after being provided on the sedimentation basin for detecting precipitation
The salt face detection sensor of salt deposit extreme position, for detecting the upper liquid level detection sensor of supernatant liquid level extreme position under
Level detection sensors device, the diluting salt face detection sensor for detecting the salt deposit extreme position after diluting, the intelligent control
The signal input part of device and salt face detection sensor, upper liquid level detection sensor, lower level detection sensors device and diluting salt face
Detection sensor is electrically connected, the output end of the intelligent controlling device and raw water confess pump, drawing liquid pump, dilution pumps, feed pump and
Centrifuge is electrically connected;
The salt recovery method, includes the following steps:
A, the waste water of saliferous is sent to evaporative crystallization in evaporator;
B, the saliferous raw water after evaporative crystallization, which is confessed to be pumped into sedimentation basin using raw water, precipitates;
C, the bottom of pond deposition in sedimentation basin has salt deposit, is supernatant above salt deposit, supernatant is evacuated to supernatant using drawing liquid pump
In collecting pit;
D, after the salt deposit in sedimentation basin reaches specified amount, drawing liquid pump stops, and will be in supernatant collection pond using dilution pumps
Supernatant is pumped into sedimentation basin and is diluted;
F, start centrifuge and the salt deposit in sedimentation basin is pumped into centrifuge using feed pump;
G, the salt derived from the discharge port of centrifuge packs, and the moisture of centrifugation is back in supernatant collection pond, supernatant collection
Supernatant in pond, which is sent into treatment tank, carries out sewage disposal;
It is described to dilute the supernatant that the supernatant being pumped into is supernatant collection pond bottom of pond;
Salt face detection sensor, upper liquid level detection sensor, lower level detection sensors device and dilution are provided on the sedimentation basin
Salt face detection sensor, the signal input part of the intelligent controlling device and salt face detection sensor, upper liquid level detection sensor,
Lower level detection sensors device and diluting salt face detection sensor are electrically connected, and output end and the raw water of the intelligent controlling device supply
Go out pump, drawing liquid pump, dilution pumps, feed pump and centrifuge to be electrically connected;
When salt face detection sensor, diluting salt face detection sensor, upper liquid level detection sensor and lower level detection sensors device all
When not detecting signal, intelligent controlling device control raw water confesses pump continue working, and saliferous raw water, which is persistently fed, in evaporator gives
Sedimentation basin, and drawing liquid pump, dilution pumps, feed pump and centrifuge stop;
When salt face, signal is not detected in detection sensor, and upper liquid level detection sensor detects signal, shows in sedimentation basin
Supernatant has reached extreme position, and the off-capacity but precipitation capacity in sedimentation basin do not reach capacity, and intelligent control fills at this time
Control drawing liquid pump action is set, raw water is confessed pump, dilution pumps, feed pump and centrifuge and stopped at this time, and level detection passes instantly
When signal is not detected in sensor, intelligent controlling device, which controls drawing liquid pump, to be stopped, and raw water is confessed pump and is again started up;
When salt face, detection sensor detects signal and diluting salt face detection sensor and upper liquid level are surveyed sensor detection and do not examined
Signal is measured, intelligent controlling device control raw water confesses pump and stops supply raw water, while starting dilution pumps by supernatant collection pond
In supernatant be pumped into sedimentation basin until diluting salt face detection sensor detect signal, then start centrifuge, feed
The salt deposit of high concentration in sedimentation basin is sent into centrifuge and is centrifuged by pump, and the water centrifuged simultaneously sends supernatant back to
In collecting pit.
2. a kind of salt recovery method of sewage treatment plant as described in claim 1, it is characterised in that:The sedimentation basin and supernatant
The function of liquid collecting pit is used alternatingly, and sedimentation basin is precipitated as salt first, and supernatant collection pond is used as supernatant collection, and works as
When being detached in the high concentration salt deposit feeding centrifuge of sedimentation basin, supernatant collection pond is used as sedimentation basin, and raw water confesses pump by saliferous
Raw water is sent into continuous precipitation in supernatant collection pond, and sedimentation basin is then used as supernatant collection at this time.
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