CN114262119A - Continuous evaporation treatment system of kitchen garbage waste water - Google Patents
Continuous evaporation treatment system of kitchen garbage waste water Download PDFInfo
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- CN114262119A CN114262119A CN202111516101.0A CN202111516101A CN114262119A CN 114262119 A CN114262119 A CN 114262119A CN 202111516101 A CN202111516101 A CN 202111516101A CN 114262119 A CN114262119 A CN 114262119A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a kitchen waste and wastewater continuous evaporation treatment system, which relates to the technical field of wastewater treatment, and comprises a denitrification treatment system, a phosphorus and phosphorus release and absorption system, a wastewater sterilization system, a wastewater heating system, a wastewater flash evaporation treatment system, a flash evaporation steam cooling system, a wastewater heating heat source system and a flue spraying evaporation system, wherein an output pipe of the denitrification treatment system is connected with the phosphorus and phosphorus release and absorption system, an output pipe of the phosphorus and phosphorus release and absorption system is connected with the wastewater sterilization system, an output pipe of sterilization wastewater of the wastewater sterilization system is connected with the wastewater flash evaporation treatment system, the wastewater flash evaporation treatment system is connected with the wastewater heating system, the sterilization wastewater in the wastewater flash evaporation treatment system flows through the wastewater heating system to be heated and then enters a spray flash evaporation mechanism of the wastewater flash evaporation treatment system to be subjected to flash evaporation continuously after the wastewater is purified, can realize zero discharge of wastewater, no blockage, no energy consumption and the function of preheating and concentrating wastewater.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a continuous evaporation treatment system for kitchen waste and wastewater.
Background
Waste water (water) is a generic term for water discharged during activities of residents and runoff rainwater. The method comprises the steps of domestic sewage, industrial wastewater and other useless water such as primary rain water flowing into a drainage pipe canal, and generally refers to water which can not be recycled after being treated by a certain technology or can not reach a certain standard after being purified by primary pollution.
The kitchen waste is a domestic waste formed by residents in the process of living consumption, is extremely easy to rot and deteriorate, can emit foul smell and spread bacteria and viruses, mainly comprises rice and flour food residues, vegetables, animal and vegetable oil, meat and bones and the like, and comprises starch, cellulose, protein, lipid and inorganic salt in chemical composition. The kitchen waste is often discarded at will, or collected as mixed domestic waste, or directly discharged into underground tunnels or rivers, and the disposal mode has great influence on the urban environment. Only by realizing a single collection, transportation and disposal system of the kitchen waste can the kitchen waste be ensured not to affect the urban environmental sanitation.
At present, in order to realize pretreatment reduction of kitchen waste wastewater, MED multi-effect evaporation of high-parameter steam is adopted, and the high-parameter steam of a unit needs to be additionally consumed. And the Mechanical Vapor Recompression (MVR) technology is adopted, and an electrically driven booster fan is utilized to additionally consume service power. The domestic membrane treatment technology is also used, and the desulfurization waste water is firstly filtered and reduced and then sprayed into a flue for evaporation. Because the amount of waste water is reduced, the required evaporation heat is reduced, and the evaporation effect is greatly improved. However, the membrane filtration reduction method has a high running cost and insufficient running safety and stability.
Disclosure of Invention
The invention mainly aims to provide a continuous evaporation treatment system for kitchen waste and wastewater, so as to solve the problems in the background.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a kitchen garbage waste water continuous evaporation processing system, spouts into evaporation system including denitrogenation processing system, phosphorus release and inhale phosphorus system, waste water sterilization system, waste water heating system, waste water flash distillation processing system, flash distillation steam cooling system, waste water heating heat source system and flue, denitrogenation processing system input tube connection waste water pretreatment device, the output tube connection of denitrogenation processing system releases phosphorus and inhales phosphorus system, the output tube connection waste water sterilization system of phosphorus release and inhale phosphorus system, the output tube connection waste water flash distillation processing system of the sterilization waste water of waste water sterilization system, waste water flash distillation processing system connects waste water heating system, sterilization waste water stream in the waste water flash distillation processing system is heated the back through waste water heating system, gets into waste water flash distillation processing system's spray flash distillation mechanism and carries out the flash distillation, and flash distillation steam of waste water flash distillation processing system divides two way pipeline to connect flash distillation steam cooling system and waste water heating heat source system respectively, flash steam cooling system inserts flash steam and cold source, carries out steam cooling and condensate recovery, and waste water heating heat source system inserts flash steam and working steam to provide heating steam and export to waste water heating system, waste water heating system still heats steam cooling and condensate recovery, and waste water flash distillation processing system's sterilization waste water circulating pipeline passes through dense shrink output tube and connects the flue and spout into evaporation system, and the concentrated waste water of reaching certain concentration spouts into the flue and evaporates.
Preferably, the denitrification treatment system comprises a denitrification tank and a stirrer, wherein the stirrer is connected to the denitrification tank, wastewater pretreated by the wastewater enters the denitrification tank to complete denitrification, and the wastewater subjected to denitrification is introduced into the phosphorus release and absorption system.
Preferably, the phosphorus release and absorption system comprises an anaerobic MBR reaction tank and an aerobic MBR reaction tank, and the wastewater after denitrification is respectively introduced into the anaerobic MBR reaction tank and the aerobic MBR reaction tank for aerobic degradation and phosphorus absorption.
Preferably, the wastewater sterilization system comprises a sedimentation tank and an ultraviolet lamp system, the ultraviolet lamp system is connected to the sterilization tank, wastewater after phosphorus release and phosphorus absorption enters the sterilization tank, and the wastewater is sterilized and disinfected by the ultraviolet lamp system in the sterilization tank to realize non-toxic treatment.
Preferably, the waste water heating system comprises a heating type condenser, a heating type condenser water system, a heating type condenser vacuumizing system, a heating type condenser steam side and a condensate water drainage system, the heating type condenser water system is connected to a waste water circulation pipeline of the waste water flash evaporation treatment system, the heating type condenser steam side is connected with a waste water heating heat source system steam outlet, steam from the waste water heating heat source system is arranged on the heating type condenser shell side, and heating steam is condensed into water to be recovered.
Preferably, the waste water flash distillation processing system includes flash tank, flash cycle system, flash tank upper portion is for spraying the flash vaporization mechanism, and the bottom is equipped with the basin, through sterilization waste water circulation tube coupling, the flash tank side is steam outlet, the export is equipped with the liquid drop separator, waste water sprays into the flash tank with vaporific or liquid drop state, is evaporated, the cooling during the stagnant air, by the flash distillation part fall into the bottom basin, concentrated sterilization waste water in the bottom basin gets into waste water heating system with the filtration processing after and heaies up, again carries flash tank upper portion through the waste water circulating pump and sprays the flash vaporization mechanism.
Preferably, the flash tank is provided with two tanks which are A, B respectively, a steam outlet of the flash tank A is connected with a steam booster of the waste water heating heat source system, the vacuum of the tank A is established by the steam booster of the waste water heating heat source system, a steam outlet of the flash tank B is connected with a condenser of the flash steam cooling system, the vacuum of the flash tank B is maintained by external cooling water, the flashed saturated steam enters the condenser and is condensed into water for recovery, water outlet pipelines at the bottoms of the two flash tanks are merged and then are connected into the waste water heating system, the inside of the flash tank is designed into one pressure cavity or a plurality of different pressure cavities, and the water inlet mode is designed into single-layer spraying or multi-layer spraying.
Preferably, the flash steam cooling system comprises a condenser, a condenser cooling system, a condenser vacuumizing system, a condenser steam side and a condensate drainage system, steam flashed out from the tank B enters the external condenser and is condensed into water for recovery, steam from the flash tank B is arranged on the shell side of the condenser, and cooling water is arranged on the tube side of the condenser.
Preferably, the waste water heating heat source system comprises a steam increasing machine, a steam suction pipeline, a working steam pipeline and a steam exhaust pipeline; the steam booster is connected with a steam outlet of the flash evaporation A tank through a steam suction pipeline, the steam booster is connected with power steam through a working steam pipeline, the steam booster is connected with a waste water heating system through a steam exhaust pipeline, the steam pipeline of the waste water heating system is also connected with steam exhaust of a steam turbine after normal high-back-pressure operation of an air cooling steam turbine or high-back-pressure operation of a water cooling steam turbine, the working steam pipeline is closed through valve control, the steam booster stops, and vacuum of the flash evaporation A tank is established and maintained by a correspondingly connected heating type condenser.
Preferably, the flue spraying evaporation system atomizing nozzle is installed at the top in the flue between the air preheater and the electric dust collector and is arranged at the flue close to one side of the air preheater.
A control method of a kitchen waste and wastewater continuous evaporation treatment system comprises the following steps,
step 1: conveying the pretreated kitchen waste wastewater into a denitrification tank through a pipeline valve and a pump, adding a denitrification material into the denitrification tank, uniformly stirring by using a stirrer, waiting for a certain time to finish denitrification of the wastewater, and respectively conveying the denitrification wastewater into an anaerobic MBR reaction tank and an aerobic MBR reaction tank through the valve and the pump;
step 2: respectively introducing the wastewater treated by the anaerobic MBR reaction tank into an anaerobic ammoxidation reaction tank and an aerobic MBR reaction tank, wherein ammonia is used as an electron donor and nitrite is used as an electron acceptor in the anaerobic ammoxidation reaction tank, the wastewater is subjected to anaerobic degradation and phosphorus release in the anaerobic MBR reaction tank, the wastewater is subjected to aerobic degradation and phosphorus absorption in the aerobic MBR reaction tank, and the wastewater after phosphorus release and phosphorus absorption is conveyed into a sterilizing tank;
step 3: the wastewater in the sterilization tank is sterilized and disinfected by an ultraviolet lamp system, and then the sterilized wastewater is conveyed to a water tank at the bottom of the flash tank through a pipeline valve and a pump;
step 4: the wastewater in the water tank at the bottom of the flash tank enters a wastewater heating system, is pressurized to 0.2Mpa, is heated to 65 ℃, enters a spraying flash mechanism above the inner parts of the first flash tank and the second flash tank, and forms spraying water mist into the tanks, wherein the flash pressure is 15kpa, the temperature is about 54 ℃, the wastewater is circulated for multiple times, and the flow rate of the circulating water is about 1030 t/h;
step 5: the first flash tank is connected with a flash steam cooling system, flash steam with the flow rate of about 10t/h enters the shell side of the condenser to be cooled and condensed, 10t of drainage is formed in a hot well of the condenser, and the steam is recycled;
step 6: the second flash tank is connected with a waste water heating heat source system, flash steam with the flow rate of about 10t/h is sucked into the ejector, power steam of the turbine is discharged from the steam turbine, the flow rate of the power steam is about 10t/h, the steam pressure at the outlet of the turbine is 26kpa, and the temperature is 105 ℃;
step 7: steam with the flow rate of 20t/h, the pressure of 26kpa and the temperature of 105 ℃ from the outlet of the steam booster enters the shell side of the heating type condenser and is used for heating wastewater flowing on the tube side, cooling the steam into condensed water and forming 20t/h hydrophobic water for recycling;
step 8: the concentrated wastewater after the flash evaporation process can enter a spraying system, and the concentrated wastewater entering the spraying system is 10 t/h;
step 9: the wastewater is changed into high-concentration wastewater with a certain temperature rise and hydrophobic water after passing through a wastewater flash evaporation treatment system, wherein the hydrophobic water can be recycled, the total amount of the high-concentration wastewater (about 1/3 of the total amount of the original input wastewater) is reduced, and the high-concentration wastewater is atomized into mist (the average particle size is less than or equal to 70 mu m) through an atomizing nozzle and sprayed into hot flue gas in a flue;
step 10: in the flue, the atomized waste water and the flue gas generate mixed heat exchange, the waste water is evaporated by using the waste heat of the exhaust smoke at the tail of the boiler, and the generated solid fine particles are captured by an electric dust collector, so that the zero discharge of the waste water is realized.
Preferably, in Step5, cooling water on the pipe side of the condenser is a large machine condensed water bypass, the inlet water temperature is less than 46 ℃, the outlet water temperature is less than 54 ℃, the circulating flow rate is 700t/h, 15KPa pressure in the flash tank is established and maintained by means of condenser circulating water cooling, and two kinds of condensed water flow to the shaft seal heater after being regulated and mixed by a bypass regulating valve.
Preferably, the flue gas temperature is reduced by about 3-8 ℃ during the Step10 evaporation process.
The invention has the following beneficial effects:
the invention provides a continuous evaporation treatment system for kitchen waste wastewater, which is characterized in that pretreated wastewater is conveyed into a denitrification tank for denitrification treatment, and the denitrified wastewater is respectively introduced into an anaerobic MBR reaction tank and an aerobic MBR reaction tank for aerobic degradation and phosphorus absorption, and then conveyed into a sterilization box for sterilization and disinfection, so that safe and nontoxic treatment is facilitated.
The invention provides a continuous evaporation treatment system for kitchen waste and wastewater, which can realize zero wastewater discharge, is not blocked, has no energy consumption, has the function of preheating and concentrating wastewater, has stronger low-load adaptation, and has very low operation cost.
Drawings
FIG. 1 is a system architecture diagram of a continuous evaporative treatment system for kitchen waste and wastewater according to the present invention;
FIG. 2 is a flow chart of a method for controlling the continuous evaporation treatment system for kitchen waste and wastewater.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The first embodiment is as follows:
please refer to fig. 1-2: the utility model provides a kitchen garbage waste water continuous evaporation processing system, spouts into evaporation system including denitrogenation processing system, phosphorus release and inhale phosphorus system, waste water sterilization system, waste water heating system, waste water flash distillation processing system, flash distillation steam cooling system, waste water heating heat source system and flue, denitrogenation processing system input tube connection waste water pretreatment device, the output tube connection of denitrogenation processing system releases phosphorus and inhales phosphorus system, the output tube connection waste water sterilization system of phosphorus release and inhale phosphorus system, the output tube connection waste water flash distillation processing system of the sterilization waste water of waste water sterilization system, waste water flash distillation processing system connects waste water heating system, sterilization waste water stream in the waste water flash distillation processing system is heated the back through waste water heating system, gets into waste water flash distillation processing system's spray flash distillation mechanism and carries out the flash distillation, and flash distillation steam of waste water flash distillation processing system divides two way pipeline to connect flash distillation steam cooling system and waste water heating heat source system respectively, flash steam cooling system inserts flash steam and cold source, carries out steam cooling and condensate recovery, and waste water heating heat source system inserts flash steam and working steam to provide heating steam and export to waste water heating system, waste water heating system still heats steam cooling and condensate recovery, and waste water flash distillation processing system's sterilization waste water circulating pipeline passes through dense shrink output tube and connects the flue and spout into evaporation system, and the concentrated waste water of reaching certain concentration spouts into the flue and evaporates.
Wherein, the denitrification treatment system comprises a denitrification tank and a stirrer, the stirrer is connected to the denitrification tank, wastewater pretreated by wastewater enters the denitrification tank to complete denitrification, and the wastewater subjected to denitrification is introduced into the phosphorus release and absorption system.
The phosphorus release and absorption system comprises an anaerobic MBR reaction tank and an aerobic MBR reaction tank, and wastewater after denitrification is respectively introduced into the anaerobic MBR reaction tank and the aerobic MBR reaction tank for aerobic degradation and phosphorus absorption.
The wastewater sterilization system comprises a sedimentation tank and an ultraviolet lamp system, the ultraviolet lamp system is connected to the sterilization tank, wastewater after phosphorus release and phosphorus absorption enters the sterilization tank, and the wastewater is sterilized and disinfected through the ultraviolet lamp system in the sterilization tank, so that nontoxic discharge is realized.
The waste water heating system comprises a heating type condenser, a heating type condenser water system, a heating type condenser vacuumizing system, a heating type condenser steam side and a condensate water drainage system, wherein the heating type condenser water system is connected to a waste water circulating pipeline of the waste water flash evaporation treatment system, the heating type condenser steam side is connected with a waste water heating heat source system steam outlet, steam from the waste water heating heat source system is arranged on the heating type condenser shell side, and the heating steam is condensed into water to be recovered.
Wherein, waste water flash distillation processing system includes flash tank, flash cycle system, and flash tank upper portion is for spraying the flash vaporization mechanism, and the bottom is equipped with the basin, through sterilization waste water circulation tube coupling, the flash tank side is steam outlet, and the export is equipped with the liquid drop separator, and waste water spouts the flash tank with vaporific or liquid drop state, is evaporated, the cooling during the sky stagnates, is not fallen into the bottom basin by the flash vaporization part, and concentrated sterilization waste water in the bottom basin gets into waste water heating system with the filtration back and heaies up, carries the flash tank upper portion again through the waste water circulating pump again and sprays the flash vaporization mechanism.
Wherein, the flash tank is equipped with two, be A, B jars respectively, flash A jar steam outlet connects the turbine that increases of waste water heating heat source system, the vacuum of A jar relies on the turbine that increases of waste water heating heat source system to establish, flash B jar steam outlet connects flash steam cooling system's condenser, its vacuum is maintained by external cooling water, the saturated steam that the flash evaporation came out gets into the condenser, condense into water and retrieve, insert waste water heating system after two flash tank bottom outlet pipe way merge, the internal design of flash tank becomes a pressure chamber or a plurality of different pressure chambers, the mode design of intaking sprays for the individual layer or the multilayer sprays.
Wherein, flash distillation steam cooling system includes condenser, condenser cooling system, condenser evacuation system, condenser steam side and condensate drainage system, and the steam that B jar flash distillation came out gets into outside condenser, is condensed into water recovery, and the condenser shell side is the steam that comes from B flash tank, and the pipe side is the cooling water.
The waste water heating heat source system comprises a steam booster, a steam suction pipeline, a working steam pipeline and a steam exhaust pipeline; the steam booster is connected with a steam outlet of the flash evaporation A tank through a steam suction pipeline, the steam booster is connected with power steam through a working steam pipeline, the steam booster is connected with a waste water heating system through a steam exhaust pipeline, the steam pipeline of the waste water heating system is also connected with steam exhaust of a steam turbine after normal high-back-pressure operation of an air cooling steam turbine or high-back-pressure operation of a water cooling steam turbine, the working steam pipeline is closed through valve control, the steam booster stops, and vacuum of the flash evaporation A tank is established and maintained by a correspondingly connected heating type condenser.
The flue spraying evaporation system atomizing nozzle is installed at the top in the flue between the air preheater and the electric dust collector and arranged in the flue on one side close to the air preheater.
A control method of a kitchen waste and wastewater continuous evaporation treatment system comprises the following steps,
step 1: conveying the pretreated kitchen waste wastewater into a denitrification tank through a pipeline valve and a pump, adding a denitrification material into the denitrification tank, uniformly stirring by using a stirrer, waiting for a certain time to finish denitrification of the wastewater, and respectively conveying the denitrification wastewater into an anaerobic MBR reaction tank and an aerobic MBR reaction tank through the valve and the pump;
step 2: respectively introducing the wastewater treated by the anaerobic MBR reaction tank into an anaerobic ammoxidation reaction tank and an aerobic MBR reaction tank, wherein ammonia is used as an electron donor and nitrite is used as an electron acceptor in the anaerobic ammoxidation reaction tank, the wastewater is subjected to anaerobic degradation and phosphorus release in the anaerobic MBR reaction tank, the wastewater is subjected to aerobic degradation and phosphorus absorption in the aerobic MBR reaction tank, and the wastewater after phosphorus release and phosphorus absorption is conveyed into a sterilizing tank;
step 3: the wastewater in the sterilization tank is sterilized and disinfected by an ultraviolet lamp system, and then the sterilized wastewater is conveyed to a water tank at the bottom of the flash tank through a pipeline valve and a pump;
step 4: the wastewater in the water tank at the bottom of the flash tank enters a wastewater heating system, is pressurized to 0.2Mpa, is heated to 65 ℃, enters a spraying flash mechanism above the inner parts of the first flash tank and the second flash tank, and forms spraying water mist into the tanks, wherein the flash pressure is 15kpa, the temperature is about 54 ℃, the wastewater is circulated for multiple times, and the flow rate of the circulating water is about 1030 t/h;
step 5: the first flash tank is connected with a flash steam cooling system, flash steam with the flow rate of about 10t/h enters the shell side of the condenser to be cooled and condensed, 10t of drainage is formed in a hot well of the condenser, and the steam is recycled;
step 6: the second flash tank is connected with a waste water heating heat source system, flash steam with the flow rate of about 10t/h is sucked into the ejector, power steam of the turbine is discharged from the steam turbine, the flow rate of the power steam is about 10t/h, the steam pressure at the outlet of the turbine is 26kpa, and the temperature is 105 ℃;
step 7: steam with the flow rate of 20t/h, the pressure of 26kpa and the temperature of 105 ℃ from the outlet of the steam booster enters the shell side of the heating type condenser and is used for heating wastewater flowing on the tube side, cooling the steam into condensed water and forming 20t/h hydrophobic water for recycling;
step 8: the concentrated wastewater after the flash evaporation process can enter a spraying system, and the concentrated wastewater entering the spraying system is 10 t/h;
step 9: the wastewater is changed into high-concentration wastewater with a certain temperature rise and hydrophobic water after passing through a wastewater flash evaporation treatment system, wherein the hydrophobic water can be recycled, the total amount of the high-concentration wastewater (about 1/3 of the total amount of the original input wastewater) is reduced, and the high-concentration wastewater is atomized into mist (the average particle size is less than or equal to 70 mu m) through an atomizing nozzle and sprayed into hot flue gas in a flue;
step 10: in the flue, the atomized waste water and the flue gas generate mixed heat exchange, the waste water is evaporated by using the waste heat of the exhaust smoke at the tail of the boiler, and the generated solid fine particles are captured by an electric dust collector, so that the zero discharge of the waste water is realized.
Wherein, the cooling water at the pipe side of the condenser in Step5 is a large machine condensed water bypass, the inlet water temperature is less than 46 ℃, the outlet water temperature is less than 54 ℃, the circulating flow is 700t/h, the 15KPa pressure in the flash tank is established and maintained by the cooling of the condenser circulating water, and the two strands of condensed water flow to the shaft seal heater after being regulated and mixed by a bypass regulating valve.
Wherein, the temperature of the smoke is reduced by about 3-8 ℃ in the process of Step10 evaporation.
In the invention, the kitchen waste wastewater continuous evaporation treatment system carries out denitrification treatment by conveying the pretreated wastewater into a denitrification tank, adding denitrification materials into the denitrification tank, stirring and mixing uniformly by using a stirrer, waiting for a certain time, then completing denitrification of the wastewater, respectively conveying the denitrification wastewater to the anaerobic MBR reaction tank and the aerobic MBR reaction tank through a valve and a pump, and the denitrified wastewater is respectively introduced into an anaerobic MBR reaction tank and an aerobic MBR reaction tank for aerobic degradation and phosphorus absorption, then the wastewater is conveyed into a sterilization box to be sterilized and disinfected by an ultraviolet lamp system, so that safe and nontoxic treatment is facilitated, the sterilized wastewater is subjected to connecting evaporation treatment, the method can realize zero discharge of wastewater, is not blocked, has no energy consumption, has the function of preheating and concentrating wastewater, has stronger low-load adaptation, and has very low operation cost.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a kitchen garbage waste water continuous evaporation processing system, its characterized in that spouts evaporation system including denitrogenation processing system, phosphorus release and inhales phosphorus system, waste water sterilization system, waste water heating system, waste water flash distillation processing system, flash distillation steam cooling system, waste water heating heat source system and flue, denitrogenation processing system input tube connection waste water pretreatment devices, the output tube connection of denitrogenation processing system releases phosphorus and inhales phosphorus system, the output tube connection waste water sterilization system of phosphorus release and inhales phosphorus system, the output tube connection waste water flash distillation processing system of the sterilization waste water of waste water sterilization system, waste water flash distillation processing system connects waste water heating system, sterilization waste water in the waste water flash distillation processing system flows through waste water heating system after, gets into waste water flash distillation processing system's the flash distillation mechanism that sprays and carries out the flash distillation, and waste water flash distillation steam of waste water flash distillation processing system divides two way pipelines to connect flash distillation steam cooling system and waste water heating heat source respectively and heats heat source system and waste water heating heat source heat The system, flash steam cooling system inserts flash steam and cold source, carries out steam cooling and condensate recovery, and waste water heating heat source system inserts flash steam and working steam to provide heating steam and export to waste water heating system, waste water heating system still heats steam cooling and condensate recovery, and waste water flash distillation processing system's sterilization waste water circulating pipeline passes through dense shrink output tube and connects the flue and spout into evaporation system, and the concentrated waste water of reaching certain concentration spouts the flue and evaporates.
2. The continuous evaporative treatment system for kitchen waste and wastewater as claimed in claim 1, wherein the denitrification treatment system comprises a denitrification tank and a stirrer, the stirrer is connected to the denitrification tank, wastewater pretreated by wastewater enters the denitrification tank to complete denitrification, and the wastewater after denitrification is introduced into the phosphorus release and absorption system.
3. The continuous evaporation treatment system for kitchen waste and wastewater according to claim 1, wherein the phosphorus release and absorption system comprises an anaerobic MBR reaction tank and an aerobic MBR reaction tank, and wastewater after denitrification is respectively introduced into the anaerobic MBR reaction tank and the aerobic MBR reaction tank for aerobic degradation and phosphorus absorption.
4. The continuous evaporation treatment system for kitchen waste and wastewater as claimed in claim 1, wherein the wastewater sterilization system comprises a sedimentation tank and an ultraviolet lamp system, the ultraviolet lamp system is connected to the sterilization tank, wastewater after phosphorus release and phosphorus absorption enters the sterilization tank, and the wastewater is sterilized and disinfected by the ultraviolet lamp system in the sterilization tank to realize non-toxic treatment.
5. The continuous evaporative treatment system for kitchen waste and wastewater as claimed in claim 1, wherein the wastewater heating system comprises a heating type condenser, a heating type condenser water system, a heating type condenser vacuumizing system, a heating type condenser steam side and a condensate water drainage system, the heating type condenser water system is connected to a wastewater circulating pipeline of the wastewater flash evaporation treatment system, the heating type condenser steam side is connected with a steam outlet of the wastewater heating heat source system, steam from the wastewater heating heat source system is arranged on the heating type condenser shell side, and heating steam is condensed into water for recovery.
6. The continuous evaporative treatment system for kitchen waste and wastewater as claimed in claim 1, wherein the wastewater flash evaporation treatment system comprises a flash tank and a flash circulation system, a spray flash mechanism is arranged at the upper part of the flash tank, a water tank is arranged at the bottom of the flash tank and connected through a sterilization wastewater circulation pipeline, a steam outlet is arranged at the side surface of the flash tank, a droplet separation device is arranged at the outlet, wastewater is sprayed into the flash tank in a mist or droplet state, the wastewater is evaporated and cooled during the stagnation period, the part which is not flashed falls into the water tank at the bottom, the sterilization wastewater concentrated in the water tank at the bottom enters a wastewater heating system for heating after being filtered, and is conveyed to the spray flash mechanism at the upper part of the flash tank again through a wastewater circulation pump; the flash tank is equipped with two, be A, B jars respectively, flash A jar steam outlet connects the turbine that increases of waste water heating heat source system, the vacuum of A jar relies on the turbine that increases of waste water heating heat source system to establish, flash B jar steam outlet connects flash steam cooling system's condenser, its vacuum is maintained by external cooling water, the saturated steam that the flash distillation came out gets into the condenser, condensate water recovery, insert waste water heating system after two flash tank bottom outlet pipe ways merge, the internal design of flash tank becomes a pressure chamber or a plurality of different pressure chambers, the mode design of intaking sprays for the individual layer or the multilayer sprays.
7. The continuous evaporative treatment system for kitchen waste and wastewater as claimed in claim 6, wherein the flash steam cooling system comprises a condenser, a condenser cooling system, a condenser vacuumizing system, a condenser steam side and a condensate drainage system, steam flashed out from the tank B enters an external condenser and is condensed into water for recovery, steam from the flash tank B is arranged on the shell side of the condenser, and cooling water is arranged on the tube side of the condenser; the waste water heating heat source system comprises a steam booster, a steam suction pipeline, a working steam pipeline and a steam exhaust pipeline; the steam booster is connected with a steam outlet of the flash evaporation A tank through a steam suction pipeline, the steam booster is connected with power steam through a working steam pipeline, the steam booster is connected with a waste water heating system through a steam exhaust pipeline, the steam pipeline of the waste water heating system is also connected with steam exhaust of a steam turbine after normal high-back-pressure operation of an air cooling steam turbine or high-back-pressure operation of a water cooling steam turbine, the working steam pipeline is closed through valve control, the steam booster stops, and vacuum of the flash evaporation A tank is established and maintained by a correspondingly connected heating type condenser.
8. The continuous evaporative treatment system for kitchen waste and wastewater as claimed in claim 1, wherein the flue spraying evaporation system atomizing nozzle is installed at the top of the flue between the air preheater and the electric precipitator and is arranged at the flue on one side close to the air preheater.
9. A control method of a kitchen waste and wastewater continuous evaporation treatment system is characterized by comprising the following steps,
step 1: conveying the pretreated kitchen waste wastewater into a denitrification tank through a pipeline valve and a pump, adding a denitrification material into the denitrification tank, uniformly stirring by using a stirrer, waiting for a certain time to finish denitrification of the wastewater, and respectively conveying the denitrification wastewater into an anaerobic MBR reaction tank and an aerobic MBR reaction tank through the valve and the pump;
step 2: respectively introducing the wastewater treated by the anaerobic MBR reaction tank into an anaerobic ammoxidation reaction tank and an aerobic MBR reaction tank, wherein ammonia is used as an electron donor and nitrite is used as an electron acceptor in the anaerobic ammoxidation reaction tank, the wastewater is subjected to anaerobic degradation and phosphorus release in the anaerobic MBR reaction tank, the wastewater is subjected to aerobic degradation and phosphorus absorption in the aerobic MBR reaction tank, and the wastewater after phosphorus release and phosphorus absorption is conveyed into a sterilizing tank;
step 3: the wastewater in the sterilization tank is sterilized and disinfected by an ultraviolet lamp system, and then the sterilized wastewater is conveyed to a water tank at the bottom of the flash tank through a pipeline valve and a pump;
step 4: the wastewater in the water tank at the bottom of the flash tank enters a wastewater heating system, is pressurized to 0.2Mpa, is heated to 65 ℃, enters a spraying flash mechanism above the inner parts of the first flash tank and the second flash tank, and forms spraying water mist into the tanks, wherein the flash pressure is 15kpa, the temperature is about 54 ℃, the wastewater is circulated for multiple times, and the flow rate of the circulating water is about 1030 t/h;
step 5: the first flash tank is connected with a flash steam cooling system, flash steam with the flow rate of about 10t/h enters the shell side of the condenser to be cooled and condensed, 10t drainage is formed in a hot well of the condenser and is recycled, cooling water on the pipe side of the condenser is a large machine condensed water bypass, the inlet water temperature is less than 46 ℃, the outlet water temperature is less than 54 ℃, the circulation flow rate is 700t/h, 15KPa pressure in the flash tank is established and maintained by means of condenser circulating water cooling, and two strands of condensed water flow to the shaft seal heater after being regulated and mixed by a bypass regulating valve;
step 6: the second flash tank is connected with a waste water heating heat source system, flash steam with the flow rate of about 10t/h is sucked into the ejector, power steam of the turbine is discharged from the steam turbine, the flow rate of the power steam is about 10t/h, the steam pressure at the outlet of the turbine is 26kpa, and the temperature is 105 ℃;
step 7: steam with the flow rate of 20t/h, the pressure of 26kpa and the temperature of 105 ℃ from the outlet of the steam booster enters the shell side of the heating type condenser and is used for heating wastewater flowing on the tube side, cooling the steam into condensed water and forming 20t/h hydrophobic water for recycling;
step 8: the concentrated wastewater after the flash evaporation process can enter a spraying system, and the concentrated wastewater entering the spraying system is 10 t/h;
step 9: the wastewater is changed into high-concentration wastewater with a certain temperature rise and hydrophobic water after passing through a wastewater flash evaporation treatment system, wherein the hydrophobic water can be recycled, the total amount of the high-concentration wastewater (about 1/3 of the total amount of the original input wastewater) is reduced, and the high-concentration wastewater is atomized into mist (the average particle size is less than or equal to 70 mu m) through an atomizing nozzle and sprayed into hot flue gas in a flue;
step 10: in the flue, the atomized waste water and the flue gas generate mixed heat exchange, the waste water is evaporated by using the waste heat of the exhaust smoke at the tail of the boiler, the generated solid fine particles are captured by an electric dust collector, the zero emission of the waste water is realized, and the temperature of the flue gas is reduced by about 3-8 ℃ in the evaporation process.
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