CN110510809A - A domestic sewage advanced treatment system without using chemicals and disinfectants - Google Patents

Abstract

It is especially a kind of without using chemical agent and the domestic sewage advanced treatment system of disinfectant comprising the second ebullated bed separator, nanofiltration device, nanofiltration device are connected with the second ebullated bed separator the present invention relates to technical field of sewage.When sanitary sewage disposal, by coagulation system, secondary treatment system, treated that sewage sequentially enters the second ebullated bed separator and nanofiltration device, by in secondary treatment system treated water outlet suspended matter and the substances removal such as dissolved organic matter, microorganism and virus, to reach the standard for being discharged into natural water or reuse outside.The present invention, which only passes through the second ebullated bed separator and nanofiltration device, can complete the advanced treating of sanitary sewage, it is no longer necessary to build coagulative precipitation tank, sterilization pool, structure is simple, and occupied area is small；It does not need using chemical agent and disinfectant, the treatment effect not influence vulnerable to water quality and environmental condition improves the treatment effect of sewage yet.

Description

A domestic sewage advanced treatment system without using chemicals and disinfectants

technical field

The invention relates to the technical field of sewage treatment, in particular to a domestic sewage advanced treatment system without using chemical agents and disinfectants.

Background technique

Urban domestic sewage is collected by the urban pipe network system and transported to the sewage treatment plant, where it is treated. At present, the domestic sewage treatment system of the sewage treatment plant includes a primary treatment system, a secondary treatment system and an advanced treatment system connected in sequence. The primary treatment system is a coarse grid assembly, fine grid assembly, and aeration grit chamber connected in sequence; the secondary treatment system is a biochemical tank and a secondary sedimentation tank connected in sequence, and the biochemical pool is connected with the aeration grit chamber. Connection, the secondary sedimentation tank is connected with the advanced treatment system; the advanced treatment system is a coagulation sedimentation tank and a disinfection tank connected in sequence. The specific treatment is as follows: the domestic sewage first passes through the coarse grid assembly and the fine grid assembly to remove the coarse floating and suspended matter in the sewage, and then the sewage enters the aeration grit chamber, and the sewage in the aeration grit chamber Advance in the form of spiral flow, further remove the sand particles, and at the same time remove part of the organic pollution in the sewage, and then the effluent enters the biochemical pool for secondary treatment. The biochemical pool contains a large number of microorganisms, which degrade the degradable organic matter in the sewage. Catabolism, microorganisms can grow and gather to form activated sludge. After treatment, the sewage enters the secondary settling tank to separate the mud and water, thereby completing the primary and secondary treatment of sewage; the sewage after primary treatment and secondary treatment It also contains some micro-suspended solids, colloids, microorganisms, viruses, heavy metals, and nitrogen and phosphorus that cause eutrophication, so advanced treatment is required to meet the sewage discharge standards; then the sewage from the secondary treatment system is sequentially After entering the coagulation sedimentation tank and disinfection tank, it can be discharged into the natural water body or reused after being sterilized in the disinfection tank. The remaining sludge in the secondary sedimentation tank directly enters the sludge treatment system for treatment and then is discharged.

The sewage treated by the primary treatment system and the secondary treatment system enters the advanced treatment system for advanced treatment before being discharged into natural water bodies or reused. At present, the treatment method in coagulation sedimentation tanks and disinfection tanks is to add chemicals according to the water quality to achieve the purpose of removing pollutants. Add coagulant to the coagulation sedimentation tank, usually aluminum salt; and add disinfectant to the disinfection tank, usually choose liquid chlorine, sodium hypochlorite, chlorine dioxide, etc., the effect of removing pollutants by adding chemicals is not only easy Affected by the sewage water quality, improper regulation will make the sewage treatment effect worse and increase the cost of sewage treatment. At the same time, the coagulation sedimentation tank and the disinfection tank not only occupy a large area, but the use of chemicals may also have other adverse effects, such as aluminum salts as When used as a coagulant, it will lead to an increase in the concentration of aluminum ions in the effluent, which will have a certain impact on animals, plants and human health; chlorine dioxide is volatile and explosive, and needs to be prepared and used on site. easy to use.

Contents of the invention

The technical problem to be solved by the present invention is to provide a domestic sewage advanced treatment system with simple structure, convenient use and good treatment effect. The domestic sewage advanced treatment system does not use chemical agents and disinfectants.

The technical solution adopted by the present invention to solve the technical problem is: a domestic sewage advanced treatment system without using chemical agents and disinfectants, including a second ebullating bed separator, a nanofiltration device, and the nanofiltration device is separated from the second ebullating bed connected to the device.

Further, the second fluidized bed separator includes a shell, a first water inlet, a first water outlet, a separation medium bed, and a discharge distributor, the first water inlet is set on the top of the shell, and the first water outlet is set At the bottom of the housing, a bed of separation media, a discharge distributor are arranged in the housing, and a bed of separation media is provided on the discharge distributor.

Further, the discharge distributor includes a partition plate and a water cap arranged on the partition plate.

Further, the first water inlet is provided with a first valve, the first water outlet is provided with a second valve, and the second fluidized bed separator also includes a gas inlet, a cleaning water inlet, a cyclone three-phase separator, and a gas inlet. , The cleaning water inlets are all set at the bottom of the shell, and the third valve is set at the gas inlet, the fourth valve is set at the cleaning water inlet, the cyclone three-phase separator is set in the shell, and the three-phase cyclone is separated The device is located on the top of the housing.

Further, the cyclone three-phase separator includes a fourth body, a feed port, a sewage outlet, and a gas outlet, the feed port is arranged at the bottom of the body, the gas outlet is arranged at the top of the fourth body, and the sewage outlet On the side of the fourth body, a fifth valve is arranged at the feed inlet, a sixth valve is arranged at the sewage outlet, and a seventh valve is arranged at the air outlet.

Further, the separation medium bed layer includes granular separation medium, and the particle size of the separation medium is between 0.1-0.2mm.

The beneficial effect of the present invention is that: the sewage advanced treatment system without using chemical agents and disinfectants includes the second fluidized bed separator and nanofiltration device. The sewage enters the second fluidized bed separator and nanofiltration device in turn, and removes suspended solids, dissolved organic matter, colloids, organic matter, total nitrogen, microorganisms and viruses in the effluent treated by the secondary treatment system, so as to achieve external Standards for discharge into natural water bodies or reuse. It can be seen that the present invention can complete the advanced treatment of domestic sewage only through the second fluidized bed separator and nanofiltration device, and no longer needs to build coagulation sedimentation tanks, disinfection tanks, and does not need to use chemicals and disinfectants, and the treatment effect is not easy Affected by water quality and environmental conditions, the sewage treatment effect is improved, the structure is simple, the advanced treatment system occupies a small area, the separation medium bed can be reused, the cost is low, automation is easy, and the efficiency is high, which is conducive to popularization.

Description of drawings

Fig. 1 is a schematic diagram of the flow structure of the domestic sewage treatment system;

Fig. 2 is the structural representation of the second fluidized bed separator;

Fig. 3 is the schematic diagram under the cleaning state of the second fluidized bed separator;

Fig. 4 is the structural representation of cyclone three-phase separator;

Fig. 5 is the structural representation of shape coalescer;

Fig. 6 is the structural representation of the second cyclone separator;

Fig. 7 is the structural representation of the first cyclone separator and sorting column;

Parts, parts and numbers in the figure: coarse grid assembly 11, fine grid assembly 12, first fluidized bed separator 13, collector 14, shape coalescer 15, third body 151, second water inlet 152 , second water outlet 153, purified oil outlet 154, fluid distributor 155, coarse granulation module 156, quick separation module 157, deep separation module 158, oil storage tank 16, biochemical tank 21, secondary settling tank 22, second Cyclone separator 23, second body 231, second feed pipe 232, second bottom flow port 233, second overflow port 234, power pump 24, second ebullating bed separator 31, housing 311, first Water inlet 312, first water outlet 313, separation medium bed 314, discharge distributor 315, partition plate 3151, water cap 3152, gas inlet 316, cleaning water inlet 317, cyclone three-phase separator 318, fourth Body 3181, material inlet 3182, sewage outlet 3183, air outlet 3184, nanofiltration device 32, mud storage tank 41, belt dehydrator 42, hot gas generator 43, first cyclone separator 44, first body 441 , the first feed pipe 442 , the first underflow port 443 , the first overflow port 444 , the gas-liquid separator 45 , and the separation column 46 .

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing.

As shown in Figure 1, the treatment system of domestic sewage includes primary treatment system, secondary treatment system and advanced treatment system. The primary treatment system is connected with the secondary treatment system, and the advanced treatment system includes a second ebullating bed separator 31 and a nanofiltration device 32, and the second ebullating bed separator 31 is connected with the secondary treatment system, and the nanofiltration device 32 is connected with the second Two ebullating bed separators 31 are connected. During the domestic sewage treatment, the sewage is processed through the primary treatment system, the secondary treatment system, the second fluidized bed separator 31 and the nanofiltration device 32 in sequence, and the sewage advanced treatment system does not use chemicals and disinfectants.

The separation medium bed in the second ebullating bed separator 31 removes suspended solids and part of dissolved organic matter in the effluent treated by the secondary treatment system, and then further removes suspended solids, colloids, Organic matter, total nitrogen, microorganisms, viruses and other substances are removed until the standards for discharge into natural water bodies or reuse are met. A preferred mode of the second ebullating bed separator 31 of the present invention is as follows: as shown in FIG. 314, the discharge distributor 315, the first water inlet 312 is arranged on the top of the housing 311, the first water outlet 313 is arranged on the bottom of the housing 311, the separation medium bed 314, and the outlet distributor 315 are arranged on the housing 311 , and the separation medium bed 314 is arranged on the discharge distributor 315, the separation medium bed 314 is a granular separation medium, the granular shape is preferably spherical, and the separation medium particle diameter is between 0.1-0.2mm, the separation medium bed Layer 314 is composed of one or more granular separation media, and its material is an organic or inorganic material with strong adsorption to pollutants in sewage, especially for suspended solids and some dissolved organic substances in sewage. Adsorption, such as anthracite, activated carbon, etc. The sewage treated by the fine grid assembly 12 enters the shell 311 from the first water inlet 312, and the sewage passes through the separation medium bed 314, the discharge distributor 315 in turn, and finally goes out from the water outlet 313, and the separation medium bed 314 has a positive effect on the sewage. The suspended matter and part of the dissolved organic matter in the sewage are intercepted and adsorbed, so that the concentration of the suspended matter and part of the dissolved organic matter in the sewage is gradually reduced until the treatment requirements are met.

For ease of installation and use, as shown in Figure 2, the discharge distributor 315 includes a partition plate 3151 and a water cap 3152 arranged on the partition plate 3151, the partition plate 3151 is laterally fixed in the housing 311, and the sewage passes through After separating the media bed layer 314, it goes out through the water cap 3152.

In order to reduce the cost of sewage treatment, realize the reuse of the separation medium in the separation medium bed 314, and increase the service time of the separation medium, a first valve can also be provided at the first water inlet 312, and a first valve can be arranged at the first water outlet 313. There is a second valve, and the second fluidized bed separator 31 is also provided with a gas inlet 316, a cleaning water inlet 317, and a cyclone three-phase separator 318, and the gas inlet 316 and the cleaning water inlet 317 are all arranged at the bottom of the housing 311, and A third valve is provided at the gas inlet 316, a fourth valve is provided at the cleaning water inlet 317, the cyclone three-phase separator 318 is arranged in the housing 311, and the cyclone three-phase separator 318 is located on the top of the housing 311, As shown in Figure 4, the cyclone three-phase separator 318 includes a fourth body 3181, a feed port 3182, a sewage outlet 3183, and a gas outlet 3184, the feed port 3182 is arranged at the bottom of the body 3181, and the gas outlet 3184 is arranged at On the top of the fourth body 3181, the sewage outlet 3183 is arranged on the side of the fourth body 3181, the fifth valve is arranged at the feeding port 3182, the sixth valve is arranged at the sewage outlet 3183, and the first valve is arranged at the air outlet 3184. Seven valves. After the second ebullated bed separator 31 has been used for a period of time, a lot of pollutants are adsorbed on the surface of the separation medium in the separation medium bed 314, and it is necessary to backwash the separation medium bed 314 to realize the regeneration of the separation medium and achieve separation medium separation. For the purpose of repeated use, backwashing is specifically: closing the first valve and the second valve, opening the third valve, the fourth valve, the fifth valve, the sixth valve, and the seventh valve, and the cleaning water with a certain pressure from the The cleaning water inlet 317 leads into the casing 311, and the gas with a certain pressure passes into the casing 311 from the gas inlet 316, and the cleaning water and gas pass through the discharge distributor 315 to make the granular separation medium Boiling, as shown in Figure 3, the separation medium carrying pollutants enters the fourth vessel 3181 of the cyclone three-phase separator 318 from the feed port 3182, and in the fourth vessel 3181, it is strengthened through the coupling of particle rotation and revolution, The separation medium and pollutants are completely separated, the pollutants are discharged from the sewage outlet 3183 and enter the sludge treatment system for treatment, the gas is discharged from the gas outlet 3184, and the separation medium flows back to the discharge distributor 315 to re-form the separation medium bed 314. After the regeneration of the separation medium bed 314 is completed, close the third valve, the fourth valve, the fifth valve, the sixth valve, and the seventh valve, and open the first valve and the second valve, so as to carry out advanced treatment of sewage. For ease of use, the above valves are controlled by a controller.

In summary, the advanced treatment system of the domestic sewage treatment system of the present invention includes a second ebullating bed separator 31. During domestic sewage treatment, the sewage treated by the primary treatment system and the secondary treatment system enters the second ebullating bed separator in turn. 31 and nanofiltration device 32, the separation medium bed 314 in the second fluidized bed separator 31 removes suspended solids and part of dissolved organic matter in the effluent of the secondary treatment system, and then the sewage is further removed by nanofiltration device 32 Suspended solids, colloids, organic matter, and total nitrogen in sewage are removed to remove microorganisms, viruses, and other substances, so as to meet the standards for discharge into natural water bodies or reuse. It can be seen that the present invention can complete the advanced treatment of sewage treatment only through the second fluidized bed separator 31 and the nanofiltration device 32, and no longer need to build coagulation sedimentation tanks, disinfection tanks, and do not need to use chemicals and disinfectants. The effect is not easily affected by water quality and environmental conditions, and the sewage treatment effect is improved. The structure is simple, the advanced treatment system occupies a small area, the separation medium bed 314 can be reused, the cost is low, it is easy to realize automation, and the efficiency is high. .

A preferred mode of the primary treatment system of the present invention is as follows: as shown in Figure 1, the primary treatment system includes a coarse grid assembly 11 and a fine grid assembly 12 connected together in sequence, and the primary treatment system also includes The first fluidized bed separator 13, collector 14, shape coalescer 15, oil storage tank 16, the first fluidized bed separator 13 has the same structure as the second fluidized bed separator 31, the fine grid assembly 12 is the same as the first fluidized bed separator The bed separators 13 are connected, the first fluidized bed separator 13 is connected with the shape coalescer 15 and the collector 14 , and the oil storage tank 16 is connected with the shape coalescer 15 . During the domestic sewage treatment, the domestic sewage passes through the coarse grid assembly 11, the fine grid assembly 12, the first ebullating bed separator 13, and the shape coalescer 15 for corresponding treatment. In order to realize that the sewage can pass through the coarse grid assembly 11, the fine grid assembly 12, the first fluidized bed separator 13, the shape coalescer 15, the coarse grid assembly 11, the fine grid assembly 12, the coarse grid assembly 11 and the Material conveying devices are provided between the fine grid assemblies 12 , between the fine grid assemblies 12 and the first ebullating bed separator 13 , and between the first ebullating bed separator 13 and the shape coalescer 15 . Specifically: during domestic sewage treatment, the sewage treated by the fine grid assembly 12 enters the first ebullating bed separator 13, and the separation medium bed in the first ebullating bed separator 13 removes the sand particles and suspended solids in the sewage And part of the organic matter is removed, and the sand and suspended solids are transported to the collector 14 for storage through the conveying device. Then the effluent enters the shape coalescer 15, and the emulsified oil in the sewage is demulsified, coalesced and separated in the shape coalescer 15, thereby being removed, and the oil after the demulsification enters the oil storage tank 16 for storage through the conveying device. After the emulsified oil in the sewage meets the treatment requirements, the primary treatment of domestic sewage is completed. It can be seen that the present invention has just completed the removal of sand particles and emulsified oil through the first ebullating bed separator 13 and the shape coalescer 15, which significantly reduces the footprint and cost of the primary treatment system; the first ebullating bed separator 13 It is also easy to operate and use, the structure is simpler, and a large amount of malodorous gas will not be generated during the treatment process, which improves the clean environment. At the same time, a large amount of emulsified oil is removed, which reduces the impact on subsequent sewage treatment and improves the sewage treatment effect.

The function of the first ebullating bed separator 13 is to remove sand particles, suspended solids and some organic matter in the sewage treated by the fine grid assembly 12 . The first ebullating bed separator 13 has the same structure as the second ebullating bed separator 31, and the separation medium bed of the first ebullating bed separator 13 is a granular separation medium, and the granularity is preferably spherical, and the separation medium particle diameter is between 0.1- Between 0.2mm, the separation medium bed is composed of one or more granular separation media, and its material is an organic or inorganic material with strong adsorption to pollutants in sewage, especially for sand and solid suspension in sewage Materials with strong adsorption, such as quartz sand, anthracite, activated carbon, etc.

The function of the shape coalescer 15 is to remove the emulsified oil in the sewage, so that the oil content in the sewage can meet the treatment requirements. A preferred form of the shape coalescer 15 of the present invention is as follows: as shown in Figure 5, the shape coalescer 15 includes a third body 151, and the third body 151 is provided with a second water inlet 152 and a second water outlet. 153. Purified oil outlet 154. The inside of the third body 151 is sequentially provided with a fluid distributor 155, a coarse-grained module 156, a quick separation module 157, and a deep separation module 158. During sewage treatment, the sewage passes through the second water inlet 152 Enter the third container body 151, adjust the flow rate and flow rate through the fluid distributor 155, and then pass through the coarse granulation module 156, the rapid separation module 157, and the deep separation module 158 to realize oil-water demulsification and separation, and the separated emulsified oil The purified oil is stored in the oil storage tank 16 through the outlet 154, and the sewage flows out through the second water outlet 153 and enters subsequent treatment.

A preferred mode of the secondary treatment system of the present invention is: again as shown in Figure 1, the secondary treatment system comprises a biochemical pool 21 and a secondary sedimentation pool 22 connected in sequence, the biochemical pool 21 is connected with the shape coalescer 15, Settling tank 22 is connected with advanced treatment system and sludge treatment system. The sewage treated by the shape coalescer 15 is processed by the biochemical pool 21 and the secondary sedimentation tank 22 successively. Between the biochemical tank 21 and the secondary sedimentation tank 22, there are material conveying devices. The biochemical pool 21 contains a large number of microorganisms. The microorganisms decompose and metabolize the degradable organic matter in the sewage, and the microorganisms grow and gather to form activated sludge. After the treatment, the sewage enters the secondary sedimentation tank 22, and the mud and water are separated in the secondary sedimentation tank 22. The generated treated sewage finally enters the advanced treatment system for treatment, and the remaining sludge in the secondary settling tank 22 directly enters the sludge treatment system for treatment. The remaining activated sludge in the secondary sedimentation tank 22, because its surface contains many residues of microbial respiration, self-oxidation, and some organic matter that is difficult for microorganisms to degrade, these objects accumulate on the surface of the activated sludge to form extracellular polymers. , the extracellular polymer wraps the microorganisms inside, which affects the degradation of organic matter by microorganisms, thereby reducing the activity of activated sludge, and the remaining activated sludge in the secondary settling tank is directly sent to the sludge treatment device for treatment and then shipped out. Such treatment will waste resources such as activated sludge and microorganisms with relatively high activity, and the utilization rate of resources is low, which increases the cost of municipal domestic sewage treatment. Obtained through a lot of practice, as shown in Figure 1 and Figure 6, the secondary treatment system of the present invention also includes a second cyclone separator 23, a power pump 24, and the second cyclone separator 23 includes a second body 231 , the second feed pipe 232, the second feed pipe 232 is vertically arranged on the side of the second body 231, one side of the second body 231 is provided with a second bottom flow port 233, and the other side is provided with a second overflow Orifice 234, one end of the power pump 24 is connected with the sludge outlet of the secondary settling tank 22 through a pipeline, the other end of the power pump 24 is connected with the second feed pipe 232 of the second cyclone separator 23, and the second bottom flow port 233 It is connected to the biochemical tank 21 through a pipeline, and the second overflow port 234 is connected to a sludge treatment system through a pipeline. The power pump 24 transports the remaining activated sludge in the secondary settling tank 22 to the second cyclone separator 23, and the activated sludge enters the second container body 231 from the second feed pipe 232, and in the second container body 231 A high-speed rotating field is generated, and the extracellular polymer wrapped on the outer surface of the activated sludge is under the action of the high-speed rotating field, and the activated sludge is coupled with rotation and rotation, and part of the extracellular polymer falls off from the outer surface of the activated sludge. The extracellular polymer is discharged from the second overflow port 234 of the second cyclone separator 23 due to its light weight, and the remaining activated sludge goes out from the second underflow port 233 of the second cyclone separator 23 and flows back to In the biochemical pool 21, due to the shedding of part of the extracellular polymer wrapped on the outer surface of the activated sludge, the microorganisms in the degradable sewage reattach to the surface of the activated sludge, and the microorganisms are used to degrade the organic matter in the sewage again, thus improving the biochemical capacity of the biochemical pool 21. The activity of the remaining activated sludge in the settling tank 22 is tested, and after being treated by the cyclone separator, the activity of the activated sludge is increased by at least 15%. The second cyclone separator 23 can not only improve the activity of activated sludge, but also optimize the swirl intensity by adjusting the split ratio of the second cyclone separator 23 to realize active separation of sludge, that is, to separate the sludge with higher activity The activated sludge is screened out, and the sludge with low activity is screened out and entered into the sludge treatment system for treatment, so as to further increase the activity of the activated sludge returned to the biochemical pool 21 and improve the degradation efficiency in the biochemical pool 21 . It can be seen that the present invention avoids the direct waste of the remaining activated sludge in the secondary settling tank 22, improves the utilization rate of resources, reduces the consumption of microorganisms, reduces the cost of the whole secondary treatment system, and improves the biochemical tank simultaneously. degradation efficiency in . After a large number of tests and practices, it is found that the first body 231 is arranged horizontally, the second feed pipe 232 is vertically arranged on the side of the first body 231, and the second bottom flow port 233 is arranged on the side of the first body 231. On the left side, the second overflow port 234 is arranged on the right side of the first body 231, so that after the remaining activated sludge in the secondary settling tank 22 is processed by the second cyclone separator 23, the activity of the activated sludge is at least Increased by 20%.

Since both the secondary treatment system and the advanced treatment system will produce sludge, the sludge must be treated. A preferred mode of the sludge treatment system of the present invention is as follows: as shown in Figures 1 and 7, the sludge treatment system includes sludge storage Pool 41, belt dehydrator 42, hot gas generator 43, gas-liquid separator 45, multiple first cyclone separators 44 connected in series in sequence, mud storage tank 41 and secondary treatment system, belt dehydrator 42, the first cyclone separator 44 includes a first body 441, a first feed pipe 442, the first feed pipe 442 is vertically arranged on the side of the first body 441, and the bottom of the first body 441 A first bottom flow port 443 is provided, and a first overflow port 444 is provided at the top. Along the direction of sludge flow, the hot gas generator 43 and the belt dehydrator 42 are all connected to the first cyclone separator 44 that is arranged first. The first feed pipe 442 is connected, and all the first overflow ports 444 are connected with the gas-liquid separator 45 .

Both the secondary treatment system and the advanced treatment system will produce a certain amount of sludge. During sludge treatment, the sludge produced by the secondary treatment system and the advanced treatment system will be transported to the sludge storage tank 41 through the material delivery device, and will be transported to the sludge storage tank 41 by the material delivery device. The sludge in the sludge storage tank 41 enters the belt dehydrator 42 for preliminary treatment. The belt dehydrator 42 can remove part of the water content in the sludge, reduce the viscosity of the sludge, and reduce the interaction between water and solid particles force, improve the dispersibility of sludge particles; then the sludge that has been preliminarily treated by the belt dehydrator 42 enters the first first cyclone separator 44 through the material conveying device for processing, and at the same time, the hot gas generating device 43 works The hot gas medium is passed into the first first cyclone separator 44, the hot gas medium can further reduce the viscosity of the sludge, the first cyclone separator 44 works, and under the action of the hot gas medium, the second A high-speed rotating field is generated in a body 441. Under the action of the high-speed rotating field, the solid particles of the sludge generate high-speed rotation and revolution in the high-speed rotating field, and the centrifugal force generated thereby overcomes the capillary resistance of adsorbing water between the solid particles. The first separation of solid particles and water in the sludge, the water and gaseous medium removed from the sludge enter the gas-liquid separator 45 through the first overflow port 444 at the top, and are realized in the gas-liquid separator 45 The sludge is separated from the gas and liquid, and the sludge enters the second first cyclone separator 44 from the first underflow port 443 of the first first cyclone separator 44, and the sludge passes through a plurality of first cyclone separators connected in series. After the cyclone separator 44, the solid particles in the sludge and the water in the sludge are separated multiple times, so as to meet the requirements for the water content of the sludge in the subsequent treatment; compared with thermal drying and thermal evaporation, the moisture in the sludge is removed The sludge treatment system of the present invention has a simple structure, relatively low energy consumption, high dehydration efficiency per unit time, reduces the cost of the sewage treatment system, and has a small footprint and simple and easy-to-operate equipment.

The belt dehydrator 42 performs preliminary treatment on the sludge, removes part of the water content in the sludge, and reduces the water content of the sludge from 99% to 80%, or even lower. The hot gas generating device 43 can generate hot gas medium. It has been found through a lot of practice that the heating temperature range of the hot gas medium is 60-80° C., and the hot gas medium can be air, nitrogen, hydrogen, etc. A plurality of first cyclone separators 44 connected together in series means: along the sludge flow direction, the first bottom flow port 443 of the first first cyclone separator 44 is separated from the second first cyclone The first feed pipe 442 of the device 44 is connected, the first bottom flow port 443 of the second first cyclone separator 44 is connected with the first feed pipe 442 of the third first cyclone separator 44, and in turn By analogy, until the first bottom outlet 443 of the penultimate first cyclone separator 44 is connected with the first feed pipe 442 of the last first cyclone separator 44 . Through a lot of practice, when the solid particles of the sludge rotate in the high-speed swirl field at a rotational speed range of 20000r/min-60000r/min, the sludge treatment system only needs two first cyclone separation units connected in series. Device 44, two first cyclone separators 44 just can reduce the water content of sludge to below 20%. In order to further reduce the water content of the sludge, the present invention is also provided with a sorting column 46, along the flow direction of the sludge, the first bottom flow port 443 of the first first cyclone separator 44 and the first bottom flow port 443 of the sorting column 46 are arranged. The feed ports are connected, and the discharge port of the sorting column 46 is connected with the first feed pipe 442 of another first cyclone separator 44 . After the sludge passes through the first first cyclone separator 44, non-phase change dehydration and drying occurs, the moisture content and volume of the sludge change, and the sludge is driven by the hot gas medium into the separation column 46, with a small volume The light sludge containing a small amount of water continues to enter another first cyclone separator 44 with the hot gas medium in the separation column 46 for drying, while the bulky sludge still containing more water, due to its volume It is heavy and sinks in the sorting column 46, and the sludge after sinking is processed by other methods, and the sorting column 46 completes the sorting function of the sludge to ensure the final drying effect of the sludge.

Claims (6)

1. a kind of without using chemical agent and the domestic sewage advanced treatment system of disinfectant, it is characterised in that: including the second boiling A separator (31), nanofiltration device (32) are risen, nanofiltration device (32) is connected with the second ebullated bed separator (31).

2. it is as described in claim 1 a kind of without using chemical agent and the domestic sewage advanced treatment system of disinfectant, it is special Sign is: the second ebullated bed separator (31) includes shell (311), the first water inlet (312), the first water outlet (313), separation Medium bed (314), discharging distributor (315), the first water inlet (312) are arranged in the top of shell (311), the first water outlet (313) setting separates medium bed (314), discharging distributor (315) is arranged in shell (311) in the bottom of shell (311) In, and medium bed (314) setting is separated in discharging distributor (315).

3. it is as claimed in claim 2 a kind of without using chemical agent and the domestic sewage advanced treatment system of disinfectant, it is special Sign is: discharging distributor (315) includes the water cap (3152) of demarcation plate (3151) and setting on demarcation plate (3151).

4. it is as claimed in claim 2 a kind of without using chemical agent and the domestic sewage advanced treatment system of disinfectant, it is special Sign is: being provided with the first valve at the first water inlet (312), the second valve, the second boiling are provided at the first water outlet (313) Rising a separator (31) further includes gas access (316), cleaning water inlet (317), eddy flow three phase separator (318), and gas enters Mouth (316), cleaning water inlet (317) are arranged at the bottom of shell (311), and are provided with third valve at gas access (316) Door cleans at water inlet (317) and is provided with the 4th valve, and eddy flow three phase separator (318) is arranged in shell (311), and revolves Stream three phase separator (318) is located at the top of shell (311).

5. it is as claimed in claim 2 a kind of without using chemical agent and the domestic sewage advanced treatment system of disinfectant, it is special Sign is: eddy flow three phase separator (318) includes the 4th body (3181), feed inlet (3182), sewage draining exit (3183), gas outlet (3184), feed inlet (3182) setting is arranged in the bottom of body (3181), gas outlet (3184) in the 4th body (3181) Top, sewage draining exit (3183) are arranged in the side of the 4th body (3181), and feed inlet is provided with the 5th valve, blowdown at (3182) It is provided with the 6th valve at mouth (3183), gas outlet is provided with the 7th valve at (3184).

6. a kind for the treatment of of domestic sewage advanced without using chemical agent and disinfectant as described in claim 2-5 any one System, it is characterised in that: separation medium bed (314) includes granular separation medium, separates medium partial size in 0.1-0.2mm Between.