CN113716827A - Be applicable to cold area row muddy water processing integrated system - Google Patents
Be applicable to cold area row muddy water processing integrated system Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The invention discloses a sludge water treatment integrated system suitable for cold regions, which comprises: the device comprises a regulating tank, an air flotation concentration tank, a sludge storage tank, a sludge dewatering room, an air dissolving device, a turbidity meter and a control unit; the water outlet of the regulating tank is connected with the water inlet of the air flotation concentration tank; the sludge outlet of the air flotation concentration tank is connected with the sludge inlet of the sludge storage tank; the sludge outlet of the sludge storage tank is connected with the sludge inlet of the sludge dewatering room; the air outlet of the air dissolving device is connected with the water outlet of the regulating tank and then connected with the water inlet of the air flotation concentration tank; the turbidimeter is arranged in the regulating tank; the control unit is respectively connected with the turbidity meter and the air dissolving device in a communication way, and can control the opening and closing of the air dissolving device according to the detection value of the turbidity meter. In this scheme, through the detected value according to the turbidity appearance, the operation technology of control air supporting enrichment pond to make the air supporting enrichment pond switch to the operational mode corresponding with quality of water, not only improved sludge thickening efficiency, also saved system's working costs moreover.
Description
Technical Field
The invention relates to the technical field of sludge water treatment, in particular to a sludge water treatment integrated system suitable for cold regions.
Background
The surface water in northern areas of China is covered by ice in 4-5 months every year, the water temperature is below 10 ℃, the turbidity is lower than 10NTU, the typical low-temperature and low-turbidity water quality in northern areas is formed, and a plurality of adverse effects are brought to water treatment, particularly a coagulation stage. Because the water of the feedwater is highly hydrophilic, the sludge must reach a certain concentration to obtain a good dehydration effect. When the sludge scraper is used for discharging sludge in the sedimentation tank of a water treatment plant, the water content of the discharged sludge is generally about 99.25-99%, and the water content of the sludge fed into the sludge dehydrator is generally required to be not higher than 97%, so that the solid concentration of the sludge discharged from the sedimentation tank needs to be concentrated to 3% in the sludge water concentration tank. As the source water in northern areas is low-turbidity and high-chroma water, the sludge generated by the turbidity in the sludge generated by the production wastewater is less, and most of the sludge is generated by the flocculating agent in the water purification treatment process. In the conventional method, the sludge is concentrated by adopting a gravity concentration method, but the sludge concentration effect is poor.
In order to overcome the problems, after groping, the sludge can be concentrated by adopting an air flotation concentration mode, and a certain expected effect is certainly achieved. However, the air flotation concentration method sometimes encounters high-turbidity sludge water, only needs to automatically precipitate and concentrate, and if the air flotation concentration method is adopted, the sludge concentration efficiency is reduced, and the equipment operation cost is increased.
Disclosure of Invention
In view of the above, the invention provides an integrated system for treating sludge water in cold regions, which is capable of controlling the operation process of an air flotation concentration tank according to the detection value of a turbidity meter, so as to switch the air flotation concentration tank to an operation mode corresponding to water quality, thereby facilitating the realization of intelligent control of the operation mode of the air flotation concentration tank, improving the sludge concentration efficiency, and saving the operation cost of the system.
In order to achieve the purpose, the invention provides the following technical scheme:
an integrated system suitable for treating muddy water in cold regions comprises: the device comprises a regulating tank, an air flotation concentration tank, a sludge storage tank, a sludge dewatering room, an air dissolving device, a turbidity meter and a control unit;
the water outlet of the regulating tank is connected with the water inlet of the air flotation concentration tank; the sludge outlet of the air flotation concentration tank is connected with the sludge inlet of the sludge storage tank; the sludge outlet of the sludge storage tank is connected with the sludge inlet of the sludge dewatering room; an air outlet of the air dissolving device is connected with a water outlet of the regulating tank firstly and then is connected with a water inlet of the air flotation concentration tank;
the turbidimeter is arranged in the regulating tank; the control unit is respectively in communication connection with the turbidity meter and the air dissolving device, and can control the opening and closing of the air dissolving device according to the detection value of the turbidity meter.
Preferably, the air dissolving device comprises: the device comprises an air compressor, a compressed air cutting device and a gas-liquid mixing and dissolving device;
the air outlet of the air compressor is connected with the air inlet of the compressed air cutting device; the water inlet of the gas-liquid mixing and dissolving device is connected with the water outlet of the regulating tank, the air inlet is connected with the air outlet of the compressed air cutting device, and the water outlet is connected with the water inlet of the air flotation concentration tank;
the air compressor is in communication connection with the control unit, and the control unit can control the on-off of the air compressor according to the detection value of the turbidity meter.
Preferably, the air dissolving device further comprises an air floating valve;
the air inlet of the air floatation valve is connected to the air outlet of the air compressor, the air outlet of the air floatation valve is connected to the air inlet of the compressed air cutting device, the air floatation valve is in communication connection with the control unit, and the control unit can control the on-off of the air floatation valve according to the detection value of the turbidity meter.
Preferably, the compressed air cutting device comprises a pipe body and a microporous plate;
the air inlet of the pipe body is connected with the air outlet of the air compressor, and the air outlet of the pipe body is connected with the air inlet of the gas-liquid mixing and dissolving device; the microporous plate is arranged in the tube body and used for cutting the compressed air entering the tube body into micro bubbles.
Preferably, the gas-liquid mixing and dissolving device comprises a gas adding device.
Preferably, the method further comprises the following steps: and the flocculation stirring device is arranged in the adjusting tank.
Preferably, the system also comprises a ceramsite preparation room and sludge transfer equipment;
the sludge transfer mechanism is used for transferring the sludge dehydrated in the sludge dehydration room to the ceramsite preparation room to be used as a main raw material for preparing the ceramsite in the ceramsite preparation room.
Preferably, the sludge dewatering room comprises a centrifugal dewatering machine;
the ceramsite preparation room comprises a ceramsite roasting furnace;
the sludge transfer equipment is arranged between the sludge dewatering room and the ceramsite preparation room in a spanning mode, one end of the sludge transfer equipment is in butt joint with a sludge outlet of the centrifugal dewatering machine, and the other end of the sludge transfer equipment is in butt joint with a feeding port of the ceramsite preparation room.
Preferably, the sludge transfer apparatus comprises a screw conveyor.
Preferably, the air flotation concentration tank comprises: the air flotation concentration tank body, the central guide cylinder, the slag scraping plate, the sludge collecting hopper and the driving mechanism;
the central guide cylinder is arranged in the air flotation concentration tank body, and an air outlet of the air dissolving device is connected with a water outlet of the regulating tank firstly and then connected with a water inlet at the bottom of the central guide cylinder; the slag scraping plate can rotate around the central guide cylinder and is arranged at the top of the air flotation concentration tank body and is flush with the preset liquid level of the air flotation concentration tank body; the top of the air flotation concentration tank body is provided with a slag collecting groove, and a slag outlet of the slag collecting groove is connected with a first sludge inlet of the sludge storage tank; the sludge scraper can rotate around the central guide cylinder and is arranged at the bottom of the air flotation concentration tank body; the sludge collecting hopper is arranged at the bottom of the air flotation concentration tank body, and a sludge outlet of the sludge collecting hopper is connected with a second sludge inlet of the sludge storage tank; the driving mechanism is used for respectively driving the slag scraping plate and the sludge scraping plate to rotate.
According to the technical scheme, the operation process of the air flotation concentration tank is controlled according to the detection value of the turbidity meter, so that the air flotation concentration tank is switched to the operation mode corresponding to the water quality, the intelligent control of the operation mode of the air flotation concentration tank is facilitated, the sludge concentration efficiency is improved, and the system operation cost is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an integrated system for treating muddy water in a cold area according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an air flotation concentration tank according to an embodiment of the present invention;
fig. 3 is a process flow chart of the integrated system for treating muddy water in cold regions according to the embodiment of the present invention.
The system comprises an air compressor, a compressed air cutting device, a pressure pump, a gas-liquid mixing and dissolving device, a water inlet pipe, a retaining cylinder, a scraper, a sludge collecting tank, a sludge discharge pipe, a sludge collecting hopper, a water outlet tank, a water outlet pipe, a chemical feeding device, a water feeding pump, a sludge storage tank, a sludge dewatering chamber, a ceramsite preparation chamber, a regulating tank, a flocculation stirring device, an air floatation valve, a recycling water tank, a sludge transfer device, an air floatation concentration tank, a turbidity meter, a control unit, an air floatation concentration tank body and a central guide cylinder, wherein the air compressor is 1, the compressed air cutting device, the pressure pump, the compressed air cutting device, the pressure pump, the gas-liquid mixing and dissolving device, the water inlet pipe, the retaining cylinder, the scraper, the sludge preparation chamber, the flocculation stirring device, the air floatation valve, the recycling water tank, the sludge transfer device, the regulating tank, the air floatation concentration tank, the turbidity meter and the central guide cylinder are arranged on the compressed air compressor, the compressed air separation device and the compressed air separation device are arranged on the compressed air separation device, wherein the compressed air separation device is arranged on the central guide cylinder and the compressed air separation device are arranged on the compressed air separation device and the air separation device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The integrated system for treating the muddy water in the cold area provided by the embodiment of the invention is shown in fig. 1 and comprises: a regulating tank 20, an air flotation concentration tank 25, a sludge storage tank 17, a sludge dewatering room 18, an air dissolving device, a turbidity meter 28 and a control unit 29;
the water outlet of the regulating tank 20 is connected with the water inlet of the air flotation concentration tank 25; the sludge outlet of the air flotation concentration tank 25 is connected with the sludge inlet of the sludge storage tank 17; the sludge outlet of the sludge storage tank 17 is connected with the sludge inlet of the sludge dewatering room 18; the air outlet of the air dissolving device is connected with the water outlet of the regulating tank 20 firstly and then is connected with the water inlet of the air flotation concentration tank 25 so as to form air dissolving water;
the turbidity meter 28 is arranged in the regulating reservoir 20; the control unit 29 is respectively connected with the turbidity meter 28 and the air dissolving device in a communication way, and the control unit 29 can control the opening and closing of the air dissolving device according to the detection value of the turbidity meter 28.
It should be noted that the flotation concentration tank 25 in the present embodiment has dual functions of flotation and sedimentation; wherein, the micro-bubble generated by the dissolved air device is rapidly attached to the water suspended matter in the adjusting tank 20, and lifts it to the top of the air flotation concentration tank 25, thereby forming a sludge floating layer which is easy to remove, and then scum is removed by the scum board, and heavier solid matters are deposited to the bottom of the air flotation concentration tank 25 by self gravity, then sludge is collected to the sludge collecting hopper by the sludge scraper, and then the sludge is discharged by the sludge discharge pipe, the details can be seen in the following description. Of course, as shown in fig. 1, the present solution further includes a pressurizing pump 3 for providing power for the sludge discharge.
In addition, according to the detection value of the turbidity meter 28, namely, according to the concentration of the suspended matters in the inlet water of the regulating tank 20, the start and stop of the dissolved air device are controlled, namely, the effect of controlling the operation mode (operation process) of the air flotation concentration tank 25 is achieved. When the detection value of the turbidity meter 28 is smaller than the preset value, the opening of the dissolved air device is controlled, so that the air flotation concentration tank 25 enters an air flotation concentration process (including both an air flotation process and a precipitation process); when the detection value of the turbidity meter 28 is greater than or equal to the preset value, the closing of the air dissolving device is controlled, so that the air flotation concentration tank 25 enters the precipitation concentration process (only comprising the precipitation process). That is to say, according to the scheme, different treatment processes are adopted through process switching according to different water qualities, so that the intelligent control of the operation mode of the air flotation concentration tank 25 can be realized. In addition, the scheme combines the precipitation and the air floatation process, exerts respective advantages, not only improves the treatment effect, but also saves the investment and the operating cost.
According to the technical scheme, the operation process of the air flotation concentration tank is controlled according to the detection value of the turbidity meter, so that the air flotation concentration tank is switched to the operation mode corresponding to the water quality, the intelligent control of the operation mode of the air flotation concentration tank is facilitated, the sludge concentration efficiency is improved, and the system operation cost is saved.
Specifically, as shown in fig. 1, the air dissolving device includes: the device comprises an air compressor 1, a compressed air cutting device 2 and a gas-liquid mixing and dissolving device 4;
an air outlet of the air compressor 1 is connected with an air inlet of the compressed air cutting device 2; the water inlet of the gas-liquid mixing and dissolving device 4 is connected with the water outlet of the regulating tank 20, the air inlet is connected with the air outlet of the compressed air cutting device 2, and the water outlet is connected with the water inlet of the air flotation concentration tank 25;
the air compressor 1 is connected with a control unit 29 in a communication way, and the control unit 29 can control the opening and closing of the air compressor 1 according to the detection value of the turbidity meter 28. In the scheme, the air dissolving device adopts an air dissolving mechanism of an air dissolving pipe, firstly, compressed air is cut into micro bubbles by using a compressed air cutting device 2, and then the micro bubbles and sludge water are mixed and dissolved by the disturbance action of an air-liquid mixing and dissolving device 4, so that the micro bubbles are quickly attached to suspended matters and are lifted to the top of an air flotation concentration tank 25, a sludge floating layer which is easy to remove is formed, and heavy solid matters are precipitated at the bottom of the tank and are also removed. Therefore, the air flotation concentration tank 25 in the scheme is the air flotation concentration tank adopting the dissolved air pipe to dissolve air, and compared with the existing pressurizing dissolved air flotation method adopting a dissolved air tank, the scheme avoids the problem of filler blockage of the dissolved air tank in the air flotation tank and also avoids the problem of controlling the height of the water level in the dissolved air tank, namely, the scheme adopts the dissolved air pipe to replace the dissolved air tank and also avoids the blockage problem of a diffuser from the source.
In addition, based on the design of the gas dissolving tube structure, the sludge water and the gas dissolving water are fully mixed in a section of pipeline before being added into the air flotation concentration tank 25, and bubbles are timely and uniformly dispersed in suspended particles, so that the air flotation concentration effect is promoted.
Further, as shown in fig. 1, the air dissolving device further includes an air floating valve 22;
the air inlet of the air floatation valve 22 is connected to the air outlet of the air compressor 1, the air outlet is connected to the air inlet of the compressed air cutting device 2, the air floatation valve 22 is in communication connection with the control unit 29, and the control unit 29 can control the on-off of the air floatation valve 22 according to the detection value of the turbidity meter 28. This scheme is so designed, for the break-make through the valve with the switching of control air compressor machine 1, have characteristics such as control structure is simple, easily design implementation.
Still further, the compressed air cutting device 2 comprises a pipe body and a microporous plate;
the air inlet of the pipe body is connected with the air outlet of the air compressor 1, and the air outlet is connected with the air inlet of the gas-liquid mixing and dissolving device 4; the microporous plate is arranged in the tube body and used for cutting the compressed air entering the tube body into micro-bubbles. In the scheme, compressed air generated by the air compressor 1 is firstly cut into micro-bubbles by utilizing a special structure microporous plate, and then is mixed and dissolved with the discharged muddy water through the gas-liquid mixing and dissolving device 4 under the condition of very violent disturbance. The air exists in two forms in the air dissolving pipe, wherein one form is dissolved in water, and the other form is that fine bubbles are wrapped and mixed in water in a free state; during air floatation, the bubbles are directly used for air floatation and are used as main sources of the bubbles, the micro bubbles released from dissolved air water are also added to the middle area in the air floatation process, the number of the micro bubbles formed by the two ways is far greater than that of the existing dissolved air tank and dissolved air releaser structure, and the essential difference between the scheme and the existing dissolved air structure is that the dissolved air pipe structure in the scheme is also the reason for not adding the dissolved air releaser. Of course, the present solution can also be passed through a high speed rotating mixer to cut the compressed air into micro-fine bubbles.
Particularly, in order to enable the sludge water and the fine bubbles to have better mixing and dissolving effects; preferably, the gas-liquid mixing and dissolving device 4 includes a gas adding device.
Wherein, the air entrainment device includes venturi nozzle and microbubble generating device. Firstly, introducing air into water through an air compressor under a pressurizing condition to form an air supersaturated state, then accelerating gas-containing water flow by using a Venturi nozzle, arranging a plurality of layers of mesh plates in a pipeline, cutting bubbles, expanding and releasing pressure to finally form micro-bubble water, then conveying the gas-dissolved water to an air floatation tank, decompressing the gas-dissolved water to separate out air, releasing the air into the water by using the micro-bubbles to realize air floatation, wherein the formed bubbles are small and about 20-100 mu m, and the turbidity removal effect is good.
Further, in order to enhance the flocculation reaction of the sludge water in the conditioning tank 20, so as to improve the sludge concentration performance of the low-temperature and low-turbidity sludge water; accordingly, as shown in fig. 1, the integrated system for treating muddy water in a cold area according to an embodiment of the present invention further includes: and a flocculation stirring device 21 arranged in the adjusting tank 20.
Furthermore, in order to realize the resource utilization of the dewatered sludge, the effect of resource utilization of waste is achieved; moreover, it is also considered that the main components of the dewatered sludge are very close to those of the clay, so that the dewatered sludge has the potential to be used as a main raw material for preparing the ceramsite; correspondingly, the integrated system for treating the sludge water in the cold area provided by the embodiment of the invention also comprises a ceramsite preparation room 19 and sludge transfer equipment 24;
the sludge transfer device 24 is used for transferring the sludge dehydrated in the sludge dehydration room 18 to the ceramsite preparation room 19, and the sludge is used as a main raw material for preparing the ceramsite in the ceramsite preparation room 19.
In this embodiment, as shown in fig. 1, the sludge dewatering room 18 includes a centrifugal dehydrator 27;
the ceramsite preparation room 19 comprises a ceramsite roasting furnace 26;
the sludge transfer device 24 is arranged between the sludge dewatering room 18 and the ceramsite preparation room 19 in a spanning manner, and one end of the sludge transfer device is in butt joint with a sludge outlet of the centrifugal dehydrator 27, and the other end of the sludge transfer device is in butt joint with a feeding port of the ceramsite preparation room 26. This scheme design like this has retrencied the transfer structure of dehydration mud, helps realizing the convenient transfer of dehydration mud.
Specifically, the sludge transfer device 24 comprises a screw conveyor, and has the characteristics of simple structure, reliable work, simple and convenient maintenance and management and the like.
In this embodiment, as shown in fig. 1 and 2, the flotation concentration tank 25 includes: the air flotation concentration tank body 30, the central guide cylinder 31, the slag scraping plate 7, the sludge scraping plate 8, the sludge collecting hopper 12 and the driving mechanism;
the central guide cylinder 31 is arranged in the air flotation concentration tank body 30, and an air outlet of the air dissolving device is connected with an water outlet of the regulating tank 20 firstly and then connected with a water inlet at the bottom of the central guide cylinder 31; the slag scraping plate 7 can rotate around the central guide cylinder 31 and is arranged at the top of the air flotation concentration tank body 30 and is flush with the preset liquid level of the air flotation concentration tank body 30; the top of the air flotation concentration tank body 30 is provided with a slag collecting tank 9, and the slag outlet of the slag collecting tank 9 is connected with a first sludge inlet of the sludge storage tank 17; the sludge scraper 8 can rotate around the central guide cylinder 31 and is arranged at the bottom of the air flotation concentration tank body 30; the sludge collecting hopper 12 is arranged at the bottom of the air flotation concentration tank body 30, and a sludge outlet of the sludge collecting hopper 12 is connected with a second sludge inlet of the sludge storage tank 17; the driving mechanism is used for respectively driving the rotation of the slag scraping plate 7 and the sludge scraping plate 8. In the scheme, scum at the top of the air flotation concentration tank 25 is scraped to a scum collecting tank 9 through a scum board 7 and then is discharged to a sludge storage tank 17 through a scum pipe 10; and the sediment (sludge) at the bottom of the air flotation concentration tank 25 is scraped to the sludge hopper 12 through a sludge scraper and then enters the sludge storage tank 17 through a sludge discharge pipe. Of course, the micro-bubbles with suspended matters enter the air flotation concentration tank body 30 from the top of the central guide flow cylinder 31.
The present solution is further described below with reference to specific embodiments:
the invention provides a sludge water treatment integrated system suitable for cold regions, as shown in figure 3, the process flow is as follows: the backwashing wastewater and the sedimentation tank drainage firstly enter an adjusting tank 20, are stirred by a flocculation stirring device 21 and then enter an air flotation concentration tank 25, the effluent after air flotation concentration is disinfected by adding chemicals and is sent to a power plant user by a water pump 16 after reacting in a reuse water tank 23. Scum in the air flotation concentration tank 25 is scraped to a scum collecting tank 9 through a scum board 7 and then is discharged to a sludge storage tank 17 through a scum pipe 10, sludge precipitated in the air flotation concentration tank 25 is collected through a sludge discharge hopper (namely a sludge collecting hopper 12) and enters the sludge storage tank 17 through a sludge discharge pipe, the scum and the sludge are mixed and then enter a sludge dewatering room 18, the moisture content of the sludge is reduced to 80% through the dehydration of a centrifugal dehydrator 27, and then the mixture is conveyed to a ceramsite preparation room 19 through a screw conveyor and is sintered into ceramsite through a ceramsite roasting furnace 26 and then transported outside. Wherein, the air flotation concentration tank adopts air flotation process or sedimentation process, the start and stop of the air compressor system is controlled by an electric control unit (namely a control unit 29) according to the SS monitor (namely a turbidity meter 28) in the adjusting tank 20, and a manual control system can be adopted to avoid the frequent opening of the valve.
The process flow adopts air flotation concentration. The air flotation concentration tank is designed as a circular reinforced concrete tank and is provided with a surface scraper system and a bottom scraper system, the surface scraper system comprises a scraper plate 7, the bottom scraper system is provided with a bottom sludge scraper 8, the bottom scraper and the surface scraper are driven by a driving system, the surface scraper is provided with a roller with a static end and moving along a track, and the tank is provided with a peripheral passageway.
The scheme adopts a dissolved air pipe mechanism, utilizes a microporous plate to cut compressed air from an air compressor 1 into micro-bubbles, then the micro-bubbles are mixed and dissolved with pressurized water through an air-entrapping device under the condition of severe disturbance to form micro-bubbles which are rapidly attached to suspended matters and lifted to the surface of an air floatation tank, so that a sludge floating layer which is easy to remove is formed, and heavier solid matters are precipitated at the bottom of the tank and are also removed. The rotary scum board 7 scrapes the scum to a scum collecting tank 9 and then enters a scum discharge pipe 10. Part of the particles with larger relative density will settle to the bottom of the tank, and the sludge scraper 8 at the bottom of the tank can also scrape the settled sludge out of the slag chamber. The bottom of the tank is provided with a mud collecting hopper 12 and a mud discharging pipe 11, and the central revolving part is provided with a mud scraping mechanism at the tank side and the tank bottom, so that the sediment in the tank can be ensured to be removed regularly, and the effluent cannot be influenced. The treated effluent flows to an annular effluent groove for collection and then is discharged after being subjected to water drop by a triangular weir plate; wherein, the play water overflow weir plate that this scheme air supporting pond set up is the triangle weir plate, in order to switch to when deposiing, makes its play water effect better.
The water content of the concentrated sludge is less than 98.5 percent.
The mechanical dehydration of the scheme adopts a centrifugal dehydration method to reduce the water content of the sludge to 80 percent.
In addition, the central guide shell may include a mixing chamber, the lower end of which communicates with the dissolved air tube. The central guide cylinder can also comprise a gradually expanding blocking cylinder, the upper end of the central guide cylinder is a horn-shaped opening, the lower end of the central guide cylinder is connected with the upper end of the mixing chamber, and micro bubbles carrying suspended matters enter the air floatation device from the upper part of the gradually expanding blocking cylinder. Due to the arrangement of the blocking barrel, micro bubbles carrying suspended matters are buffered in the blocking barrel to a certain extent, and excessive interference on surrounding water is avoided. The central draft tube may further include a water inlet tube for dissolved gas water connected to the mixing chamber below the mixing chamber, the dissolved gas water entering the mixing chamber through the water inlet tube for dissolved gas water.
At present, clay ceramsite is mainly used as ceramsite, most of raw materials are from the land, and the clay ceramsite is undoubtedly destroyed to the soil environment. In recent years, China has been restricted to clay products, so that the clay products are also restricted to be used as raw materials of ceramsite.
The feedwater sludge is mainly generated after surface water is treated, so that the main components of the feedwater sludge are very close to those of clay, the feedwater sludge is very easy to combine with the clay, the mixture utilizes the component composition, the water content and other characteristics of the feedwater sludge, the feedwater sludge is used as a main material, and the bentonite is used as an auxiliary material to prepare ceramsite for recycling application.
Taking sludge dehydrated to 80% as a main raw material, and taking bentonite as an auxiliary raw material to prepare ceramsite, wherein the raw material ratio is 70%: 30 percent (the water supply sludge with the water content of 80 percent: bentonite), and the ceramsite with the roasting temperature of 1000 ℃ can be used as an adsorbing material for sewage treatment, thereby achieving the effect of treating wastes with processes of wastes against one another.
The process flow aims at the low-temperature and low-turbidity water sludge discharge water treatment integrated technology in cold regions, and the sludge discharge water is subjected to reduction, harmless treatment and resource treatment.
The beneficial effect of this scheme:
1. through the switching of multi-functional high-efficient air supporting pond, can adopt different treatment process according to different quality of water, nimble application, intelligent management and control. Specifically, when the SS of inlet water reaches 200, starting the air compressor and adopting an air floatation process; and when the SS of the inlet water reaches 600, the air compressor is closed, and a precipitation process is adopted. The air compressor is controlled to be started through the SS numerical value, so that the air flotation and sedimentation processes are switched. And the switching work of sedimentation and air flotation can also be carried out according to different seasons or different water inlet parameters. The realization mode is that the tank has the double functions of air floatation and sedimentation. Wherein, the micro-bubbles formed by air floatation are quickly attached to the suspended matters and lifted to the surface of the air floatation tank. Thereby forming a sludge floating layer which is easy to remove, removing scum through the mud scraping plate, settling heavier solid matters to the bottom of the pool by the self gravity, collecting sludge to the sludge collecting hopper through the mud scraping plate, and discharging the sludge through the sludge discharge pipe.
2. Compared with the existing pressurizing dissolved air floatation method adopting the dissolved air pipe, the scheme has no problem of filler blockage and no problem of controlling the height of the water level in the dissolved air tank, and the 'cost' is also treated when the scheme treats the 'mark'. (air is micronized before dissolution). The original sludge water and the dissolved air water are fully mixed in a section of pipeline before being added into the air floatation tank body, and the bubbles are timely and uniformly dispersed in the suspended particles, so that the phenomenon of nonuniform bubbles caused by different opening degrees of a plurality of valves or dissolved air releasers is avoided. In addition, compared with the existing pressurizing dissolved air floatation method adopting the dissolved air pipe, the scheme also omits a return system of clear water, including a return pump, a return water tank and the like, saves water quantity and reduces energy consumption.
3. The realization mode of the air dissolving pipe mechanism of the scheme is that a special structure microporous plate is utilized, compressed air is firstly cut into micro bubbles, 44 is then mixed and dissolved with pressurized water under the condition of very violent disturbance, and at the moment, the air exists in two forms in the air dissolving pipe, wherein one form is dissolved in water, and the other form is that the micro bubbles are wrapped and mixed in water in a free state; during air floatation, the bubbles are directly used for air floatation, and as a main source of the bubbles, the micro bubbles released from dissolved air water are also added into an air floatation process, the number of the micro bubbles formed by the two ways is far greater than that of the structures of a dissolved air tank and a dissolved air releaser, and the essential difference of the two dissolved air structures is also the reason for the dissolved air pipe structure not needing the dissolved air releaser.
4. Aiming at the problems of high sludge viscosity, poor settleability and difficult dehydration of sludge water in cold areas, the coagulated sludge water is injected into a mixing chamber at the bottom of an air floatation tank and contacts with air saturated water flowing through a pressure relief valve to form small bubbles to be attached to solid particles.
5. Because the precipitation method in the water purification process is used for many years, the dissolved air floatation method is suitable for the light and easy-to-float impurities; for dense and heavy impurities, precipitation is preferably used. In general, the flocs formed by the chemical addition and mixing reaction are preferably floated at a higher speed than the precipitates by the air flotation method. Because the air floatation method occupies small area and the tank volume is small, the treated effluent has good water quality, low turbidity and SS (suspended solid) and high dissolved oxygen, and the water content of the discharged scum is far lower than that of sludge discharged by a precipitation method. The volume ratio of the sludge is 1/10-1/2, which brings great convenience to the further treatment and disposal of the sludge and saves the cost.
The innovation point of the scheme is as follows:
1. the double-function high-efficiency air flotation tank comprises: the novel multifunctional efficient air flotation tank is adopted, and the switching work of sedimentation and air flotation can be carried out according to different seasons or different water inlet parameters. The tank body form has double functions of air floatation and sedimentation. When an air flotation form is adopted: micro bubbles formed by air floatation are quickly attached to the suspended matters and lifted to the surface of the air floatation tank, so that a sludge floating layer which is easy to remove is formed, and the sludge floating layer is removed by a slag scraping plate; when precipitation is used: scum is removed through the scum board, and heavier solid matters settle to the bottom of the pool by self gravity, and sludge is collected to a sludge collecting hopper through the scum board and is discharged through a sludge discharge pipe.
2. The intelligent control system comprises: the method adopts the most advanced intelligent control system at present, realizes the operation mode of intelligently controlling the air flotation tank by an intelligent control platform of a regulating tank, an air flotation concentration tank, a sludge storage tank, an air dissolving device and a turbidity meter, and controls platform software according to a set logic algorithm. If the SS of the inlet water reaches 200, starting the air compressor and adopting an air floatation process; when the inlet water SS reaches a set value (such as 600), the air compressor and the dissolved air reflux system are closed, and a precipitation process is adopted. And the air compressor is controlled to be started through the SS value so as to switch the air flotation and precipitation processes. Therefore, by collecting water inlet and running parameters in real time, performing trend analysis and expert intelligent prejudgment and a post feedback mode, reasonably determining how to realize switching of operation modes and intelligent adjustment of running parameters, and the management and control platform software adopts the current popular general language, can be accessed into an automatic control system of the whole water treatment plant, and can also run independently.
3. The unique gas dissolving tube releases a gas dissolving structure: the air dissolving mechanism of the air dissolving pipe is adopted, a special structure microporous plate is utilized, compressed air is firstly cut into micro bubbles, then the micro bubbles are mixed and dissolved with pressurized water under the condition of extremely violent disturbance, and at the moment, the air exists in two forms in the air dissolving pipe, wherein one form is dissolved in the water, and the other form is that the micro bubbles are wrapped and mixed in the water in a free state. During air floatation, the bubbles are directly used for air floatation, and as a main source of the bubbles, the micro bubbles released from dissolved air water are also added into an air floatation process, the number of the micro bubbles formed by the two ways is far greater than that of the structures of a dissolved air tank and a dissolved air releaser, and the essential difference of the two dissolved air structures is also the reason for the dissolved air pipe structure not needing the dissolved air releaser. This scheme is compared with the present pressurization dissolved air float method that adopts dissolved gas jar, does not have the problem of filler jam, also does not have the problem of control jar interior water level height because when it is "mark" of treating, also treated "this". (air is micronized before dissolution). The raw water and the dissolved air water are fully mixed in a section of pipeline before being added into the air floatation tank body, and the bubbles are timely and uniformly dispersed in the suspended particles. The phenomenon of uneven bubbles caused by different opening degrees of a plurality of valves or dissolved air releasers is avoided. Compared with the existing pressurizing dissolved air floatation method adopting a dissolved air tank, the scheme omits a return system of clear water, comprises a return pump, a return water tank and the like, saves water quantity and reduces energy consumption.
4. A unique single factor control method: this scheme adopts turbidity as the only parameter of control operation, and its principle is simple, combines the different operating modes that the water works intake, utilizes high accuracy turbidity analysis appearance (online) to realize closed-loop control, can conveniently survey the muddy water turbidity of row of production process aquatic, realizes intelligent management and control. Whether the evaluation of the activated sludge and the whole biological treatment process, the analysis of the wastewater discharged after purification treatment, or the monitoring of the sludge concentration in different stages, can give continuous and accurate measurement results without being disturbed by color. And can automatically compensate the interference caused by the color change of the activated sludge due to the flow change, annual climate fluctuation or other reasons. Unlike conventional systems, which require continuous color compensation, the turbidity analyzers used require "measurement stability" and "measurement repeatability" to be faster and more reliable, requiring that the automatic cleaning system of the analyzer probe be able to prevent erroneous readings due to air bubbles and sludge particles. The turbidity analyzer can be connected with the advanced equipment controller in the world, such as an SC1000 digital universal controller which can be accessed in a hash.
5. The method has the advantages of efficient removal and resource utilization: various inorganic particles, organic matters and precursors forming chromaticity in the sludge water discharged from a water treatment plant are separated from the water through high-efficiency air floatation, the effect of gravity precipitation concentration is better than that of the traditional gravity precipitation method, the removal capability of the organic matters and the precursors forming chromaticity is improved, the formed scum can be used as a phosphorus removal agent and an adsorbent for water environment treatment after dehydration and firing, the waste recycling is realized, the national call is responded, and the requirements of circular economy are matched.
The protection point of this scheme:
the process flow aims at the low-temperature and low-turbidity water sludge discharge water treatment integrated technology in cold regions, and the sludge discharge water is subjected to reduction, harmless treatment and resource treatment.
Aiming at the characteristics of low-temperature low-turbidity raw water containing algae for discharging muddy water in reservoir water in northern areas, the conventional treatment method is poor in gravity concentration treatment effect, scum cannot settle, and the requirement of 97% of water content cannot be met.
The air flotation tank is applied to water purification plants and sewage treatment processes, but is not applied to low-temperature low-turbidity sludge discharge water treatment processes of northern water purification plants. The invention innovatively introduces the air floatation tank into the sludge water treatment process of a low-temperature and low-turbidity water purification plant, controls the operation of the air floatation concentration tank by adopting an intelligent control mode, and avoids the problems of filler blockage and air releaser blockage of the air dissolving tank of the traditional air floatation tank by adopting the air dissolving mechanism of the air dissolving pipe.
And (5) resource utilization of the waste. The main components of the feed water sludge are very close to those of the clay, so that the feed water sludge is very easy to combine with the clay to be used as a mixture. The sludge is subjected to sludge concentration and mechanical dehydration and then is used as a main raw material for preparing the ceramsite, and the drained sludge can be used for preparing a ceramsite filter material and meets various indexes. The method comprises the steps of utilizing the composition, the water content and other characteristics of the water supply sludge, carrying out resource utilization by taking the water supply sludge as a main material and bentonite as an auxiliary material to prepare ceramsite, carrying out adsorption treatment on sewage, and adjusting the raw material ratio and the roasting temperature of the ceramsite with the best ammonia nitrogen adsorption effect. The best effect of removing ammonia nitrogen in the wastewater is achieved by utilizing the best roasting temperature and the raw material ratio.
In addition, the scheme aims at the problem that the treatment effect of low-temperature and low-turbidity sludge discharge water is not ideal, and the concentration is carried out by adopting an air floatation tank. The resource utilization of the dewatered sludge can apply the prepared ceramsite to sewage treatment for adsorbing and removing pollutants.
The water supply sludge is used for sewage treatment, phosphorus in the sewage can be removed by the water supply sludge, and the effect is good; the sludge formed by adding the aluminum salt coagulant is used for treating pollutants in the wastewater, and experiments show that in the sewage treatment, the treatment effect of adding the aluminum-containing sludge on COD in water is very obvious, the removal rate of the COD is increased along with the increase of the stirring speed, and the process is mainly physical adsorption.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a be applicable to cold district row's muddy water treatment integrated system which characterized in that includes: a regulating tank (20), an air flotation concentration tank (25), a sludge storage tank (17), a sludge dewatering room (18), an air dissolving device, a turbidity meter (28) and a control unit (29);
the water outlet of the regulating tank (20) is connected with the water inlet of the air flotation concentration tank (25); a sludge outlet of the air flotation concentration tank (25) is connected with a sludge inlet of the sludge storage tank (17); the sludge outlet of the sludge storage tank (17) is connected with the sludge inlet of the sludge dewatering room (18); an air outlet of the air dissolving device is connected with a water outlet of the regulating tank (20) firstly and then is connected with a water inlet of the air flotation concentration tank (25);
the turbidity meter (28) is arranged in the regulating reservoir (20); the control unit (29) is respectively in communication connection with the turbidity meter (28) and the air dissolving device, and the control unit (29) can control the opening and closing of the air dissolving device according to the detection value of the turbidity meter (28).
2. The integrated system for treating muddy water in cold regions as claimed in claim 1, wherein said air dissolving device comprises: the device comprises an air compressor (1), a compressed air cutting device (2) and an air-liquid mixing and dissolving device (4);
the air outlet of the air compressor (1) is connected with the air inlet of the compressed air cutting device (2); a water inlet of the gas-liquid mixing and dissolving device (4) is connected with a water outlet of the regulating tank (20), an air inlet is connected with an air outlet of the compressed air cutting device (2), and a water outlet is connected with a water inlet of the air flotation concentration tank (25);
the air compressor (1) is in communication connection with the control unit (29), and the control unit (29) can control the opening and closing of the air compressor (1) according to the detection value of the turbidity meter (28).
3. The integrated system for treating muddy water in cold regions as claimed in claim 2, wherein said air dissolving device further comprises an air floating valve (22);
the air inlet of the air floatation valve (22) is connected to the air outlet of the air compressor (1), the air outlet of the air floatation valve is connected to the air inlet of the compressed air cutting device (2), the air floatation valve (22) is in communication connection with the control unit (29), and the control unit (29) can control the on-off of the air floatation valve (22) according to the detection value of the turbidity meter (28).
4. The integrated system for treating muddy water applicable to cold districts of claim 2, wherein said compressed air cutting device (2) comprises a tubular body and a microporous plate;
the air inlet of the pipe body is connected with the air outlet of the air compressor (1), and the air outlet of the pipe body is connected with the air inlet of the gas-liquid mixing and dissolving device (4); the microporous plate is arranged in the tube body and used for cutting the compressed air entering the tube body into micro bubbles.
5. The integrated system for treating muddy water discharged from cold regions as claimed in claim 2, wherein said gas-liquid mixing and dissolving device (4) comprises an air-entraining device.
6. The integrated system for treating muddy water in cold districts as claimed in claim 1, further comprising: and the flocculation stirring device (21) is arranged on the adjusting tank (20).
7. The integrated system for treating sludge water in the cold regions as claimed in claim 1, further comprising a ceramsite preparation room (19) and a sludge transfer device (24);
the sludge transfer equipment (24) is used for transferring the sludge dehydrated by the sludge dehydration room (18) to the ceramsite preparation room (19) to be used as a main raw material for preparing the ceramsite in the ceramsite preparation room (19).
8. The integrated sludge water treatment system suitable for cold districts according to claim 7, wherein said sludge dewatering room (18) comprises a centrifugal dewatering machine (27);
the ceramsite preparation room (19) comprises a ceramsite roasting furnace (26);
the sludge transfer equipment (24) is arranged between the sludge dewatering room (18) and the ceramsite preparation room (19) in a spanning mode, one end of the sludge transfer equipment is in butt joint with a sludge outlet of the centrifugal dewatering machine (27), and the other end of the sludge transfer equipment is in butt joint with a feeding inlet of the ceramsite preparation room (26).
9. The integrated system for treating muddy water discharged from cold regions according to claim 7, wherein said sludge transfer means (24) comprises a screw conveyor.
10. The integrated system for treating muddy water discharged from cold regions according to claim 1, wherein said air flotation concentration tank (25) comprises: the air flotation concentration tank body (30), the central guide cylinder (31), the slag scraping plate (7), the sludge scraping plate (8), the sludge collecting hopper (12) and the driving mechanism;
the central guide flow cylinder (31) is arranged in the air flotation concentration tank body (30), and an air outlet of the air dissolving device is connected with a water outlet of the regulating tank (20) firstly and then is connected with a water inlet at the bottom of the central guide flow cylinder (31); the slag scraping plate (7) can rotate around the central guide cylinder (31) and is arranged at the top of the air flotation concentration tank body (30) and is flush with the preset liquid level of the air flotation concentration tank body (30); a slag collecting groove (9) is formed in the top of the air flotation concentration tank body (30), and a slag outlet of the slag collecting groove (9) is connected to a first sludge inlet of the sludge storage tank (17); the sludge scraper (8) can rotate around the central guide cylinder (31) and is arranged at the bottom of the air flotation concentration tank body (30); the sludge collecting hopper (12) is arranged at the bottom of the air flotation concentration tank body (30), and a sludge outlet of the sludge collecting hopper (12) is connected to a second sludge inlet of the sludge storage tank (17); the driving mechanism is used for respectively driving the slag scraping plate (7) and the sludge scraping plate (8) to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111142719.5A CN113716827A (en) | 2021-09-28 | 2021-09-28 | Be applicable to cold area row muddy water processing integrated system |
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| CN202111142719.5A CN113716827A (en) | 2021-09-28 | 2021-09-28 | Be applicable to cold area row muddy water processing integrated system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117819683A (en) * | 2024-03-05 | 2024-04-05 | 江苏牧格机械有限公司 | Sewage treatment system and method special for plastic recycling and cleaning line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117819683A (en) * | 2024-03-05 | 2024-04-05 | 江苏牧格机械有限公司 | Sewage treatment system and method special for plastic recycling and cleaning line |
| CN117819683B (en) * | 2024-03-05 | 2024-06-18 | 江苏牧格机械有限公司 | Sewage treatment system and method special for plastic recycling and cleaning line |
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