CN217051954U - Sludge drying condensate water treatment system - Google Patents

Abstract

The utility model discloses sludge drying condensate water processing system includes preprocessing device, biochemical treatment device, ultrafiltration device and sludge treatment device, preprocessing device is used for carrying out the preliminary treatment to the mummification comdenstion water and gets rid of suspended solid and grease wherein, biochemical treatment device is including hydrolysis acidification pond and denitrogenation subassembly, hydrolysis acidification pond links to each other with preprocessing device in order to carry out hydrolysis acidification to sewage and handle, denitrogenation subassembly links to each other with hydrolysis acidification pond in order to carry out denitrogenation to the sewage that carries out hydrolysis acidification, ultrafiltration device links to each other with denitrogenation subassembly in order to filter the sewage after the denitrogenation and make its mud-water separation, sludge treatment device is used for handling the mud that preprocessing device and biochemical treatment device produced; according to the utility model discloses sludge drying comdenstion water processing system, through the sewage that hydrolytic acidification pond hydrolytic acidification handled for sewage biodegradability improves, thereby makes biological method sewage treatment's effect reinforcing.

Description

Sludge drying condensate water processing system

Technical Field

The utility model relates to a sewage treatment technical field especially relates to a sludge drying condensate water processing system.

Background

In recent years, the national sewage treatment rate has exceeded 90%. However, a large amount of sludge containing a large amount of harmful substances is generated during the sewage treatment. At present, three sludge disposal routes which can be applied in large-scale engineering are provided: firstly, burning, secondly, land utilization and thirdly, landfill. Sludge drying is the basic step of sludge disposal. Sludge drying incineration is a thorough reduction and stabilization method, and sludge incineration can replace part of fire coal to recycle heat energy, so that the sludge drying incineration is widely applied at present. In the sludge drying process, a large amount of condensed water is generated, the sludge drying process is mainly characterized in that the concentration of pollutants is high, the components are complex, the sludge drying process belongs to high-concentration organic sewage, the characterization values of main pollutants are CODCr, NH3-N, total nitrogen and the like, and in the related technology, the sludge drying condensed water contains refractory organic matters, the biodegradability is poor, and the effect of biological sewage treatment is poor.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent.

Therefore, the embodiment of the utility model provides a sludge drying condensate water processing system, sludge drying condensate water processing system's biological method sewage treatment's effect is better.

According to the utility model discloses sludge drying condensate water processing system includes preprocessing device, biochemical treatment device, ultrafiltration device and sludge treatment device, preprocessing device is used for carrying out the preliminary treatment to the mummification comdenstion water and gets rid of suspended solid and grease wherein, biochemical treatment device is including hydrolysis acidification pond and denitrogenation subassembly, hydrolysis acidification pond with preprocessing device links to each other with right sewage carries out hydrolysis acidification and handles, the denitrogenation subassembly with hydrolysis acidification pond links to each other and carries out the denitrogenation with the sewage that carries out hydrolysis acidification and handles, ultrafiltration device with the denitrogenation subassembly links to each other and makes its mud-water separation with the sewage filtration after the denitrogenation, sludge treatment device is used for handling preprocessing device with the mud that biochemical treatment device produced.

According to the utility model discloses sludge drying condensate water processing system, at first cool down and get rid of suspended solid and grease in the drying condensate water through preprocessing device mummification condensate water, then connect sewage to the hydrolytic acidification pond, sewage adopts hydrolytic acidification method to handle in the hydrolytic acidification pond, it becomes the micromolecule through microorganism ectoenzyme hydrolysis with suspended organic matter and macromolecular substance (carbohydrate, fat and lipid etc.) in the sewage, the micromolecule organic matter converts into easily degradable organic matters such as volatile fatty acid under the effect of acidizing bacteria, make the biochemical nature of sewage improve, thereby make biological process sewage treatment's effect reinforcing.

In some embodiments, preprocessing device includes consecutive heat exchanger, air supporting pond and equalizing basin, the heat exchanger is used for giving the mummification condensate water cooling, the air supporting pond is used for getting rid of suspended solid and grease in the mummification condensate water, the equalizing basin is used for adjusting the quality of water and the water yield of sewage, the equalizing basin with it links to each other to hydrolyze the acidizing pond.

In some embodiments, the denitrification assembly comprises a primary denitrification tank, a primary nitrification tank, a secondary denitrification tank and a secondary nitrification tank which are connected in sequence, and the hydrolysis acidification tank is respectively connected with the primary denitrification tank and the secondary denitrification tank.

In some embodiments, a cyclone aerator is arranged in the primary nitrification tank and/or the secondary nitrification tank.

In some embodiments, the ultrafiltration device comprises an ultrafiltration membrane tank and an ultrafiltration membrane arranged in the ultrafiltration membrane tank, and the ultrafiltration membrane tank is connected with the secondary nitrification tank.

In some embodiments, the ultrafiltration membrane is a polytetrafluoroethylene hollow fiber membrane.

In some embodiments, the device further comprises a water production tank and a backwashing pump, wherein the water production tank is connected with the ultrafiltration membrane tank to store purified water discharged from the ultrafiltration membrane tank, the backwashing pump is arranged on a pipeline between the water production tank and the ultrafiltration membrane tank, and the backwashing pump is used for backwashing the ultrafiltration membrane.

In some embodiments, the sludge treatment apparatus includes a sludge tank connected to the pretreatment apparatus and the biochemical treatment apparatus, and a dehydrator for dehydrating the sludge stored in the sludge tank.

Drawings

Fig. 1 is a schematic diagram of a sludge drying condensate water treatment system according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a pretreatment device of a sludge drying condensate water treatment system according to an embodiment of the present invention.

FIG. 3 is a schematic view of a denitrification assembly of the sludge drying condensate treatment system according to the embodiment of the present invention.

Fig. 4 is a schematic view of a sludge treatment device of a sludge drying condensate water treatment system according to an embodiment of the present invention.

Fig. 5 is an overall flow chart of the sludge drying condensate water treatment system according to the embodiment of the utility model.

Reference numerals: a pretreatment device 1, a heat exchanger 11, an air floatation tank 12 and an adjusting tank 13,

a biochemical treatment device 2, a hydrolysis acidification tank 21, a denitrification component 22, a primary denitrification tank 221, a primary nitrification tank 222, a secondary denitrification tank 223, a secondary nitrification tank 224 and a nitrified liquid reflux pump 225,

the ultra-filtration device (3) is provided with a micro-filtration device,

a sludge treatment device 4, a sludge tank 41, a dehydrator 42,

a water inlet pump 5, a water producing pool 6, a water producing pump 7, a backwashing pump 8, an air blower 9 and a mud inlet pump 10.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary intended for explaining the present invention, and should not be construed as limiting the present invention.

The following describes a sludge drying condensate water treatment system according to an embodiment of the utility model with reference to the attached drawings.

As shown in fig. 1, the sludge drying condensate water treatment system according to the embodiment of the present invention comprises a pretreatment device 1, a biochemical treatment device 2, an ultrafiltration device 3, a sludge treatment device 4, the pretreatment device 1 is used for pretreating drying condensate water and removing suspended matters and grease therein, the biochemical treatment device 2 comprises a hydrolysis acidification tank 21 and a denitrification component 22, the hydrolysis acidification tank 21 is connected with the pretreatment device 1, sewage in the pretreatment device 1 is connected into the hydrolysis acidification tank 21 for hydrolysis acidification treatment, the hydrolysis acidification tank 21 adopts hydrolysis acidification method to control anaerobic biological reaction in sewage in two stages of hydrolysis and acidification, suspended organic matters and macromolecular substances (carbohydrate, fat and grease, etc.) can be hydrolyzed into micromolecule through microbial extracellular enzyme, micromolecule organic matters are converted into volatile fatty acids and other easily degradable organic matters under the action of acidification bacteria, the biodegradability of the sewage is improved under the action of the hydrolysis acidification tank 21; the denitrification component 22 is connected with the hydrolysis acidification tank 21, sewage subjected to hydrolysis acidification treatment in the hydrolysis acidification tank 21 enters the denitrification component 22, the denitrification component 22 performs denitrification on the sewage subjected to acidification treatment, the ultrafiltration device 3 is connected with the denitrification component 22, the ultrafiltration device 3 filters the denitrified sewage to separate sludge and water, and the sludge treatment device 4 is used for treating sludge generated by the pretreatment device 1 and the ultrafiltration device 3.

Furthermore, a water distributor is arranged in the hydrolysis acidification tank 21, the water distributor has the functions of water distribution and hydraulic stirring, sewage in the pretreatment device 1 enters the hydrolysis acidification tank 21 and is distributed with water through the water distributor, a filler is arranged in the hydrolysis acidification tank 21, so that the concentration of microorganisms is improved, the hydrolysis acidification tank 21 is of a steel-concrete structure, the top of the hydrolysis acidification tank is covered with a cover, the pretreatment device 1 is arranged at the beginning of the whole system, the biochemical treatment device 2 is arranged at the middle end of the whole system, and the ultrafiltration device 3 is arranged at the tail end of the whole system.

According to the utility model discloses sludge drying condensate water processing system, at first through pretreatment device 1 to the mummification condensate water cool down and get rid of suspended solid and grease in the mummification condensate water, then connect sewage to hydrolysis acidification tank 21, sewage adopts hydrolysis acidification method to handle in hydrolysis acidification tank 21, with the suspended organic matter and the macromolecular substance (carbohydrate in the sewage, fat and lipid etc.) through the extracellular enzymatic hydrolysis of microorganism into the micromolecule, the micromolecule organic matter converts into easily degradable organic matters such as volatile fatty acid under the effect of acidizing bacteria, make sewage biodegradability improve, thereby make biological method sewage treatment's effect reinforcing.

As shown in fig. 2 and 5, in some embodiments, the pretreatment device 1 includes a heat exchanger 11, a floatation tank 12, and a conditioning tank 13, which are connected in series.

The heat exchanger 11 is arranged at the initial water inlet end of the sludge drying condensate water treatment system, the temperature of the drying condensate water is higher and can reach more than 50 ℃, so that the heat exchanger 11 can inhibit the growth of microorganisms of a subsequent biochemical system, such as the growth of nitrobacteria, and can reduce the temperature of the initial drying condensate water, and the heat exchanger 11 can adopt a plate type or a tube type heat exchanger 11.

The air flotation tank 12 is used for removing suspended matters and grease in the dried condensed water, the top of the air flotation tank 12 is provided with a skimming device, the bottom of the air flotation tank 12 is provided with a mud bucket, and the air flotation tank 12 is integrally covered and sealed.

The adjusting tank 13 is used for adjusting the water quality and the water yield of sewage, the adjusting tank 13 adopts a semi-underground steel-concrete structure, a stirrer is arranged in the adjusting tank 13, the adjusting tank 13 is connected with the hydrolysis acidification tank 21, a water inlet pump 5 is arranged on a pipeline connected between the adjusting tank 13 and the hydrolysis acidification tank 21, the sewage treated by the adjusting tank 13 is connected into the hydrolysis acidification tank 21 through the water inlet pump 5, and the adjusting tank 13 can be independently established or combined with the hydrolysis acidification tank 21.

Specifically, the drying system condensate water is firstly cooled by a heat exchanger 11, the drying condensate water subjected to cooling treatment by the heat exchanger 11 enters an air flotation tank 12, a skimming device is used for removing suspended matters and grease in the air flotation tank 12, scum is collected and transported outwards, an ultrafiltration device 3 at the tail end of the system is prevented from being blocked by dirt, sludge generated by air flotation is deposited in a mud bucket, the sludge in the mud bucket is conveyed to a sludge treatment device 4, water flows out of the air flotation tank 12, the sewage subjected to air flotation is connected to an adjusting tank 13, a stirrer fully stirs the sewage subjected to air flotation to ensure that the water quality of the inlet water of a subsequent biochemical treatment device 2 is uniform, in order to balance the water quality and the water quantity of the sewage subjected to air flotation, the retention time of the sewage subjected to air flotation in the adjusting tank 13 is not less than one day, and finally the outlet water of the adjusting tank 13 is lifted by a water inlet pump 5 to enter a hydrolysis acidification tank 21.

As shown in fig. 3 and 5, in some embodiments, the denitrification assembly 22 includes a primary denitrification tank 221, a primary nitrification tank 222, a secondary denitrification tank 223, and a secondary nitrification tank 224, which are connected in sequence, the hydrolysis-acidification tank 21 is connected to the primary denitrification tank 221 and the secondary denitrification tank 223, respectively, the primary denitrification tank 221 and the secondary denitrification tank 223 are connected to an external blower 9, respectively, and the blower 9 supplies air to the primary denitrification tank 221 and the secondary denitrification tank 223.

Further, a reverse stirrer is arranged in the first-stage denitrification tank 221, a first-stage overflowing hole is formed in the first-stage denitrification tank 221, sewage in the first-stage denitrification tank 221 enters the first-stage nitrification tank 222 through the first-stage overflowing hole, and a first-stage cyclone aerator is arranged at the bottom of the first-stage nitrification tank 222.

Further, a nitrifying liquid reflux pump 225 is connected between the first-stage denitrification tank 221 and the first-stage nitrification tank 222, sewage treated by the first-stage nitrification tank 222 flows back to the first-stage denitrification tank 221 through the nitrifying liquid reflux pump 225, a first-stage water passing hole is formed in the first-stage nitrification tank 222, sewage in the first-stage nitrification tank 222 automatically flows into the second-stage denitrification tank 223 through the first-stage water passing hole, a second anti-stirrer is arranged in the second-stage denitrification tank 223, a second-stage flow passing hole is formed in the second-stage denitrification tank 223, sewage in the second-stage denitrification tank 223 automatically flows into the second-stage nitrification tank 224 through the second-stage flow passing hole, and a second-stage cyclone aerator is arranged at the bottom of the second-stage nitrification tank 224.

Further, the primary denitrification tank 221, the primary nitrification tank 222, the secondary denitrification tank 223 and the secondary nitrification tank 224 are of semi-underground steel-concrete structures, and the tops of the primary denitrification tank 221, the primary nitrification tank 222, the secondary denitrification tank 223 and the secondary nitrification tank 224 are covered with covers.

Specifically, the hydrolysis acidification tank 21 adopts weir effluent, most of the sewage after hydrolysis acidification enters the primary denitrification tank 221, the small part enters the secondary denitrification tank 223, dissolved oxygen in the primary denitrification tank 221 and the secondary denitrification tank 223 is controlled to be below 0.5mg/L, in the primary denitrification tank 221, denitrifying bacteria use organic matters in the influent water as electron donors to reduce nitrate nitrogen in the mixed liquid pumped from the primary nitrification tank 222 through the nitrifying liquid reflux pump 225 into nitrogen gas, so as to remove total nitrogen in the sewage, a reverse stirrer enables the sewage to be in full contact with microorganisms to prevent sinking, in the primary nitrification tank 222, heterotrophic microorganisms use oxygen to oxidize and decompose the organic matters in the sewage, remove COD (chemical oxygen demand) and BOD (biochemical oxygen demand), simultaneously nitrifying bacteria convert the organic matters into nitrate nitrogen, and flow back to the primary denitrification tank 221 through the nitrifying liquid reflux pump 225 to perform denitrification, in the secondary denitrification tank 223, denitrifying bacteria utilize residual organic matters in sewage and organic matters in a small part of effluent of the hydrolysis acidification tank 21 as carbon sources for denitrification, so as to further reduce total nitrogen in the effluent, in order to ensure denitrification effect, an additional carbon source can be supplemented if necessary, the total nitrogen which is not removed in the primary denitrification tank 221 and the primary nitrification tank 222 is subjected to denitrification treatment in the secondary denitrification tank 223, COD (chemical oxygen demand) and BOD (biochemical oxygen demand) are further reduced by oxidation in the secondary nitrification tank 224, and the effluent is prevented from not reaching the standard due to excessive additional carbon sources, the denitrification component 22 realizes multi-point water inflow of the denitrification tank, and the additional carbon source is saved.

Further, the primary cyclone aerator can be arranged on one side or two sides of the wall of the primary nitrification tank 222, the primary cyclone aerator comprises a primary branch pipe and a primary main pipe, the primary branch pipe is connected with the primary main pipe through a flange, the primary main pipe is arranged on the top of the primary nitrification tank 222, and when the primary nitrification tank is overhauled, the flange connecting the primary branch pipe and the primary main pipe is disassembled, so that the primary cyclone aerator can be lifted out of the primary nitrification tank 222; second grade whirl aerator can nitrify pond 224 pool wall unilateral or two side arrangements in the second grade for second grade whirl aerator is difficult for blockking up, and second grade whirl aerator includes that second grade branch pipe and second grade are responsible for, and flange joint between second grade branch pipe and the second grade are responsible for, and the second grade is responsible for and installs at second grade nitrify pond 224 tank deck, when overhauing, is responsible for the flange that links to each other with the second grade branch pipe with the second grade and unpacks apart, can nitrify the pond 224 interior proposition of second grade whirl aerator follow second grade.

Like this, through the explanation above, biochemical treatment device 2 adopts hydrolysis acidification technology and two-stage AO technology, and then has improved the biochemical nature of going out water greatly, nitrifies the aerator in the pond and adopts the whirl aerator, not only is difficult for blockking up, only need during the maintenance with the aerator branch pipe with be responsible for the flange that links to each other unpack apart can follow the aerator in the pond and propose can, it is convenient to overhaul.

In some embodiments, the ultrafiltration device 3 comprises an ultrafiltration membrane tank and an ultrafiltration membrane, the ultrafiltration membrane tank is connected with the secondary nitrification tank 224, the effluent of the secondary nitrification tank 224 automatically flows into the ultrafiltration membrane tank, the ultrafiltration membrane is installed in the ultrafiltration membrane tank, the sludge and water in the ultrafiltration membrane tank are separated through the ultrafiltration membrane, the activated sludge and macromolecular organic matters in the biochemical treatment device 2 are retained, water and micromolecular organic matters pass through the ultrafiltration membrane, so that the hydraulic retention time and the sludge retention time can be respectively controlled, the concentration of the activated sludge is improved, an aeration device is arranged in the ultrafiltration membrane tank, and the aeration device is used for carrying out aeration scrubbing on the ultrafiltration membrane when the ultrafiltration device 3 produces water.

In some embodiments, the ultrafiltration membrane is a polytetrafluoroethylene hollow fiber membrane, and compared with a tubular ultrafiltration mode, the energy consumption of immersion ultrafiltration of the polytetrafluoroethylene hollow fiber membrane is low, the filling density of the polytetrafluoroethylene hollow fiber membrane is high, the occupied area is small, and the polytetrafluoroethylene hollow fiber membrane has higher pollution resistance and higher membrane flux compared with polyvinylidene fluoride hollow fiber.

As shown in fig. 5, in some embodiments, the sludge drying condensation water treatment system further comprises a water production tank 6 and a backwash pump 8, the water production tank 6 is connected with the ultrafiltration membrane tank to store purified water discharged from the ultrafiltration membrane tank, a water production pump 7 is connected between the water production tank 6 and the ultrafiltration membrane tank, a water production pipe is arranged on the ultrafiltration membrane, the water production pipe is connected with a water suction port of the water production pump 7, the water is separated from mud and water by suction of the water production pump 7 to produce water, a water outlet pipe of the water production pump 7 is divided into two outlet paths, the outlet path is up-to-standard water, the outlet path is directly discharged outwards, the outlet path is connected to the water production tank 6, the backwash pump 8 is arranged between the water production tank 6 and the ultrafiltration membrane tank, the backwash pump 8 is connected to a pipeline of the water production pipe, and the backwash pump 8 uses water in the water production tank 6 to backwash the ultrafiltration membrane.

As shown in fig. 4 and fig. 5, in some embodiments, sludge treatment device 4 includes sludge impoundment 41 and hydroextractor 42, sludge impoundment 41 links to each other with air supporting pond 12 and ultrafiltration membrane pond, be connected with the sludge recirculation pump on the pipeline between ultrafiltration membrane pond and the sludge impoundment 41, the play way of sludge recirculation pump is divided into two routes, pump delivery to hydrolysis acidification tank 21 all the way, connect to sludge impoundment 41 all the way, be equipped with the mud agitator in the sludge impoundment 41, be connected with into dredge pump 10 between sludge impoundment 41 and the hydroextractor 42, the mud in the sludge impoundment 41 connects to hydroextractor 42 through advancing dredge pump 10 and dewaters, hydroextractor 42 can select to fold spiral shell hydroextractor 42, the filtrating after hydroextractor 42 dewaters flows to equalizing basin 13 through the pipeline certainly.

The following describes a method for treating sludge drying condensate water according to an embodiment of the present invention with reference to fig. 5.

According to the utility model discloses sludge drying comdenstion water processing method includes: a pretreatment device 1, a biochemical treatment device 2, an ultrafiltration device 3 and a sludge treatment device 4 are provided.

The pretreatment device 1 comprises a heat exchanger 11, an air flotation tank 12 and an adjusting tank 13, the heat exchanger 11 is used for reducing the temperature of the dried condensate water to below 35 ℃, and the dried condensate water with the temperature of above 50 ℃ is prevented from generating inhibition effect on the growth of microorganisms such as nitrobacteria in the subsequent biochemical treatment device 2; the dried condensed water after being cooled enters an air floatation tank 12, suspended matters and grease in the dried condensed water after being cooled are removed by adopting an air floatation method, the ultrafiltration device 3 behind the sewage blockage is prevented from being polluted, and sewage enters an adjusting tank 13 to adjust the water quality and the water quantity so as to balance the water quality and the water quantity.

The biochemical treatment device 2 comprises a hydrolysis acidification tank 21 and a denitrification assembly 22, wherein the denitrification assembly 22 comprises a first-stage denitrification tank 221, a first-stage nitrification tank 222, a second-stage denitrification tank 223 and a second-stage nitrification tank 224 which are sequentially connected, and sewage in the adjusting tank 13 enters the hydrolysis acidification tank 21 and is treated by adopting a hydrolysis acidification method, so that the biodegradability of the sewage is improved.

Specifically, most of the sewage in the hydrolytic acidification tank 21 sequentially enters a primary denitrification tank 221, a primary nitrification tank 222, a secondary denitrification tank 223 and a secondary nitrification tank 224 to be treated by a secondary anaerobic-aerobic process, the sewage in the primary nitrification tank 222 can flow back to the primary denitrification tank 221 for repeated treatment, heterotrophic microorganisms in the primary nitrification tank 222 can utilize oxygen to oxidize and decompose organic matters in the sewage to remove COD and BOD, meanwhile nitrifying bacteria can convert ammonia nitrogen into nitrate nitrogen, the nitrate nitrogen flows back to the primary denitrification tank 221 through a nitrifying liquid reflux pump 225 to be denitrified, and the denitrifying bacteria in the primary denitrification tank 221 utilize the organic matters in the inlet water as an electron donor to reduce the nitrate nitrogen in the mixed liquid pumped from the primary nitrification tank 222 through the nitrifying liquid reflux pump 225 into nitrogen and remove the total nitrogen in the sewage; a small part of sewage enters the secondary denitrification tank 223 and the secondary nitrification tank 224 in turn to be treated by the primary anaerobic-aerobic process, and in the secondary denitrification tank 223, denitrifying bacteria utilize residual organic matters in the sewage and organic matters in a small part of effluent of the hydrolysis acidification tank 21 as carbon sources to carry out denitrification so as to further reduce the total nitrogen in the effluent.

The ultrafiltration device 3 comprises an ultrafiltration membrane pool and an ultrafiltration membrane, wherein sewage in the secondary nitrification pool 224 enters the ultrafiltration membrane pool, sludge-water separation is carried out through the ultrafiltration membrane to generate purified water and sludge, so that the hydraulic retention time and the sludge retention time are controlled, the function of the bioreactor is enhanced, the concentration of active sludge in a biochemical system is improved, water is discharged from the ultrafiltration membrane pool, one part of purified water is discharged to the outside, the other part of purified water enters the water production pool 6, the water in the water production pool 6 is utilized to carry out online backwashing on the ultrafiltration membrane, and a chemical agent can be added into the backwashing water if necessary to help to recover the membrane flux; compared with tubular ultrafiltration, the ultrafiltration membrane has the advantages of low energy consumption, high filling density and small occupied area compared with a flat plate membrane, and the polytetrafluoroethylene hollow fiber membrane has stronger pollution resistance and higher membrane flux compared with polyvinylidene fluoride hollow fiber.

Sludge treatment equipment 4 includes sludge impoundment 41 and hydroextractor 42, mud in the air supporting pond 12 gets into in the sludge impoundment 41, some of mud in the milipore filter pond carry to sludge impoundment 41, and the purpose is for controlling the age of mud, and another part flows back to hydrolysis acidification tank 21, mud in the sludge impoundment 41 sends into the mummification workshop after hydroextractor 42 dewaters, and the filtrating that hydroextractor 42 produced gets into in equalizing basin 13.

To sum up, according to the utility model discloses coal slime sorting method can reach following beneficial effect.

(1) The sewage is hydrolyzed and acidified by the hydrolysis acidification tank 21, so that the biochemical property of the inlet water is improved, and the biological method effect is greatly improved.

(2) And the two-stage AO denitrification adopts a first-stage denitrification tank 221, a first-stage nitrification tank 222, a second-stage denitrification tank 223 and a second-stage nitrification tank 224 to efficiently reduce the total nitrogen concentration in the sewage, so that the effluent can more easily and stably reach the standard.

(3) The ultrafiltration membrane adopts a polytetrafluoroethylene hollow fiber membrane, so that the operation cost is low, the pollution resistance is strong, and the occupied area is small.

(4) The aerators in the first-stage nitrification tank 222 and the second-stage nitrification tank 224 adopt rotational flow aerators which are not easy to block and convenient to overhaul.

(5) The primary denitrification tank 221 can feed water from the hydrolysis acidification tank 21 or the primary nitrification tank 222, the secondary denitrification tank 223 can feed water from the hydrolysis acidification tank 21 or the secondary nitrification tank 224, and the denitrification component 22 can feed water at multiple points, so that additional carbon sources can be saved.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (8)

1. A sludge drying condensate water treatment system is characterized by comprising:

the pretreatment device is used for pretreating the dried condensate water and removing suspended matters and grease in the dried condensate water;

the biochemical treatment device comprises a hydrolysis acidification tank and a denitrification component, the hydrolysis acidification tank is connected with the pretreatment device to carry out hydrolysis acidification treatment on the sewage, and the denitrification component is connected with the hydrolysis acidification tank to carry out denitrification on the sewage subjected to hydrolysis acidification treatment;

the ultrafiltration device is connected with the denitrification component to filter the denitrified sewage to separate sludge and water;

and the sludge treatment device is used for treating the sludge generated by the pretreatment device and the biochemical treatment device.

2. The sludge drying condensate water treatment system of claim 1, wherein the pretreatment device comprises a heat exchanger, an air flotation tank and an adjusting tank which are connected in sequence, the heat exchanger is used for cooling the drying condensate water, the air flotation tank is used for removing suspended matters and grease in the drying condensate water, the adjusting tank is used for adjusting the water quality and the water quantity of sewage, and the adjusting tank is connected with the hydrolysis acidification tank.

3. The sludge drying condensate water treatment system of claim 1, wherein the denitrification assembly comprises a primary denitrification tank, a primary nitrification tank, a secondary denitrification tank and a secondary nitrification tank which are connected in sequence, and the hydrolysis acidification tank is respectively connected with the primary denitrification tank and the secondary denitrification tank.

4. The sludge drying condensate water treatment system according to claim 3, wherein a cyclone aerator is arranged in the primary nitrification tank and/or the secondary nitrification tank.

5. The sludge drying condensate water treatment system according to claim 3, wherein the ultrafiltration device comprises an ultrafiltration membrane tank and an ultrafiltration membrane arranged in the ultrafiltration membrane tank, and the ultrafiltration membrane tank is connected with the secondary nitrification tank.

6. The sludge drying condensate water treatment system of claim 5, wherein the ultrafiltration membrane is a polytetrafluoroethylene hollow fiber membrane.

7. The sludge drying condensate water treatment system according to claim 5, further comprising a water production tank and a backwash pump, wherein the water production tank is connected with the ultrafiltration membrane tank to store purified water discharged from the ultrafiltration membrane tank, the backwash pump is arranged on a pipeline between the water production tank and the ultrafiltration membrane tank, and the backwash pump is used for backwashing the ultrafiltration membrane.

8. The sludge drying condensate water treatment system according to claim 1, wherein the sludge treatment device comprises a sludge tank and a dehydrator, the sludge tank is connected with the pretreatment device and the biochemical treatment device, and the dehydrator is used for dehydrating the sludge stored in the sludge tank.

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