CN212504451U - Distributed kitchen equipment wastewater treatment system - Google Patents
Distributed kitchen equipment wastewater treatment system Download PDFInfo
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- CN212504451U CN212504451U CN202020657367.1U CN202020657367U CN212504451U CN 212504451 U CN212504451 U CN 212504451U CN 202020657367 U CN202020657367 U CN 202020657367U CN 212504451 U CN212504451 U CN 212504451U
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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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- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
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Abstract
The utility model provides a distributing type kitchen equipment waste water's processing system, include: the high-temperature cooking unit comprises a heat exchanger and a high-temperature cooking tank; an oil-water separator; the solid-liquid separation unit comprises a flocculation tank and a solid-liquid separator; and a biological rotating disk. The utility model discloses a processing system realizes resource recovery and utilizes, energy saving and emission reduction and reduce cost when making the effluent reach emission standard.
Description
Technical Field
The utility model relates to an environmental protection and energy utilization technical field, specifically, the utility model relates to a distributing type kitchen equipment waste water's processing system.
Background
The kitchen waste has the characteristics of high water content, easy biodegradation, easy decay and odor generation, is odor waste generating odor, bad waste polluting other good waste, is easy to breed mosquitoes and flies, spreads diseases and generates a large amount of garbage percolate.
At present, the mainstream treatment technology for kitchen waste mainly comprises anaerobic fermentation and aerobic fermentation. The anaerobic fermentation process is mostly used for large kitchen waste treatment plants for centralized treatment, and various combined processes in the plants can make the kitchen waste treatment harmless, quantitative-reduction and resource-recovery. The aerobic fermentation process is mainly used for on-site and distributed kitchen waste treatment projects, is a small-sized integrated kitchen waste aerobic fermentation device, has small floor area and small scale, is suitable for commercial streets, enterprises and public institutions, large hotels and the like, can make kitchen waste aerobically fermented into organic fertilizer for resource utilization, but has the defects of complex components of kitchen waste water obtained by solid-liquid separation, high organic matter content (COD content reaches about 5000 mg/L), high suspended matter content, high grease content (oil content is about 2-3%), virus, pathogenic bacteria and pathogenic microorganisms are carried, small water quantity and the like. The traditional air floatation oil removal, anaerobic fermentation and biochemical treatment process needs larger field and investment, the oil purity rate of the air floatation oil removal is lower, the resource utilization value is lower, and the methane generated by the anaerobic fermentation needs to be treated and utilized. Various factors make this traditional technique unsuitable for the waste water treatment that distributed kitchen equipment produced.
SUMMERY OF THE UTILITY MODEL
In order to solve the whole or partial problem, the utility model aims to provide a distributing type kitchen equipment waste water's processing system realizes resource recycle, energy saving and emission reduction and reduce cost when making water reach emission standard.
On the one hand, the distributed kitchen equipment wastewater treatment method comprises the following steps:
(1) heating the wastewater to be treated, and then performing high-temperature cooking treatment;
(2) separating the material obtained by the high-temperature cooking treatment into an oil phase and a first water phase, and cooling the first water phase;
(3) performing flocculation precipitation treatment on the cooled first water phase, and then performing solid-liquid separation to obtain a solid phase and a second water phase;
(4) the second aqueous phase is subjected to a biological treatment.
Optionally, in the step (2), the first aqueous phase is returned to the step (1) to exchange heat with the wastewater to be treated so as to realize temperature rise of the wastewater to be treated and temperature reduction of the first aqueous phase.
Optionally, in the step (1), the temperature of the high-temperature cooking treatment is 65-70 ℃ and the time is 30-45 minutes.
Optionally, in the step (3), the pH value of the cooled first aqueous phase is adjusted to 6-9.
Optionally, in step (4), the sludge produced by the biological treatment is returned to the flocculation precipitation treatment of step (3).
On the other hand, a distributed kitchen equipment waste water treatment system includes:
the high-temperature cooking unit comprises a heat exchanger and a high-temperature cooking tank, wherein a wastewater outlet of the heat exchanger is connected with an inlet of the high-temperature cooking tank and is used for exchanging heat and heating the wastewater to be treated, and the high-temperature cooking tank is used for performing high-temperature cooking treatment on the wastewater to be treated;
the oil-water separator is used for separating the material obtained by the high-temperature cooking treatment into an oil phase and a first water phase, an inlet of the oil-water separator is connected with an outlet of the high-temperature cooking tank, and a high-temperature water outlet of the oil-water separator is connected with a high-temperature water inlet of the heat exchanger;
the solid-liquid separation unit comprises a flocculation tank and a solid-liquid separator, wherein a water inlet of the flocculation tank is connected with a low-temperature water outlet of the heat exchanger and used for performing flocculation precipitation treatment on the first water phase, and an inlet of the solid-liquid separator is connected with a water outlet of the flocculation tank and used for separating the first water phase into a solid phase and a second water phase;
the biological rotating disc is used for carrying out biological treatment.
Optionally, the solid-liquid separation unit further comprises: the dosing device is connected with a medicament inlet of the flocculation tank and is used for adding alkali and/or a flocculating agent into the flocculation tank.
Optionally, the solid-liquid separation unit further comprises: and the pumping device is arranged at the downstream of the solid-liquid separator and is used for returning the solid phase separated by the solid-liquid separator to the distributed kitchen equipment.
Optionally, the sludge outlet of the biological rotating disc is connected with the sludge inlet of the flocculation tank so as to return the sludge generated by the biological rotating disc to the flocculation tank.
Optionally, the high-temperature cooking unit, the oil-water separator, the solid-liquid separation unit and the biological rotating disc are integrated in a container and mounted in a skid-mounted manner.
Compared with the prior art, the technical scheme of the utility model following beneficial effect has at least:
1. the utility model discloses a distributed kitchen equipment waste water treatment method adopts the novel process combination of 'cooking heating sterilization oil extraction + flocculation precipitation dehydration + biological treatment + heat exchange energy conservation' to treat kitchen waste water, and effluent reaches the emission standard;
2. the treatment method of the distributed kitchen equipment wastewater adopts a high-temperature cooking process, not only can extract grease, but also can effectively kill viruses, harmful bacteria and pathogenic organisms in the kitchen wastewater, thereby achieving the effect of sterilization and disinfection;
3. the grease separated by the distributed kitchen equipment wastewater treatment method has high purity and high resource utilization value; the dewatered sludge can also return to a biochemical fermentation bin to produce organic fertilizer, so that the resource utilization rate of waste is high;
4. the treatment method of the waste water of the distributed kitchen equipment adopts the water phase heat exchange after the raw water and the solid-liquid are separated, thereby saving energy and reducing the operation cost;
5. the utility model discloses a distributed kitchen equipment waste water's processing system can integrate sled dress formula integrated device, and area is little, and the civil engineering is with low costs, sparingly invests in.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In the drawings:
FIG. 1 is a process flow diagram of the distributed kitchen equipment wastewater treatment method of the present invention.
Fig. 2 is a schematic diagram of the distributed kitchen equipment wastewater treatment system of the utility model.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the present invention, "%" means "% by weight" unless otherwise specified.
Compared with centralized large-scale kitchen waste treatment engineering, the distributed kitchen waste treatment device mainly aims at places with small kitchen waste production quantity, such as hotels, restaurants, institutions, learning, communities, streets and the like, can be collected to a large-scale kitchen waste treatment plant without concentration, avoids secondary pollution caused by dripping and scattering in the collection and transportation process, can be treated on the spot in the places, integrates various process sections for treating the kitchen waste, such as separation, crushing, dehydration, aerobic fermentation and the like, into a device, and forms a small-scale integrated kitchen waste treatment device. This mode of kitchen waste treatment is called distributed kitchen waste treatment.
It should be noted that, in the utility model, the "distributed kitchen equipment", "distributed kitchen waste aerobic fermentation device", "distributed kitchen waste fermentation bin" and "distributed kitchen biochemical machine" have similar meanings and can be used interchangeably.
To "moisture content height, easy biodegradable, perishable production foul" characteristics of the kitchen waste water of separating out among the distributing type kitchen garbage aerobic fermentation device, the utility model provides a processing method and the processing system of distributing type kitchen equipment waste water uses "cooking heating sterilization oil extraction + flocculation and precipitation dehydration + biological treatment + heat transfer energy-conserving" novel technology combination to handle kitchen waste water, guarantees that water reaches emission standard, and the higher utilization that can do of grease purity that proposes, and each device of this technology all can be integrated in a container, can adopt sled dress formula installation, saves the civil engineering cost, and area is little.
In a first aspect, the utility model provides a distributed kitchen equipment wastewater treatment method, which adopts the concept of cooking, heating, sterilizing, oil extracting, flocculating, precipitating, dewatering, biological treatment and preferably heat exchange and energy conservation.
Specifically, as shown in fig. 1, the treatment method of the distributed kitchen equipment wastewater of the utility model comprises the following steps:
(1) cooking, oil extraction and sterilization:
firstly, heating the wastewater to be treated to 40-70 ℃, for example, 40 ℃ or 65-70 ℃; and then, carrying out high-temperature cooking treatment on the heated wastewater, specifically, heating the wastewater to 65-70 ℃, and maintaining the temperature for 30-45 minutes, for example, the heating temperature reaches 70 ℃, and maintaining the temperature for more than 45 minutes.
Animal and vegetable oil in the waste water separated by the distributed kitchen biochemical machine accounts for about 2% -3%, most of the oil contained in the kitchen waste water and suspended solids can be converted into floating oil through the step, and most of the combined water in the materials is converted into free water. Thus, the extracted crude oil has high purity and certain benefit; after oil extraction, the organic matter content in the kitchen wastewater can be reduced, and the subsequent process treatment load is reduced; the grease in the material is converted into floating oil and the bound water is converted into free water, so that the subsequent solid-liquid separation and oil-water separation are facilitated; moreover, the high-temperature cooking can also sterilize and disinfect viruses, pathogenic bacteria, pathogenic microorganisms and the like in the wastewater.
(2) Oil-water separation:
and (3) carrying out centrifugal separation treatment on the wastewater material subjected to cooking oil extraction and sterilization to separate the wastewater material into an oil phase and a first water phase, and then carrying out cooling treatment on the first water phase.
The grease in the kitchen wastewater mainly exists in the forms of oil slick, dispersed oil, emulsified oil, dissolved oil and the like. The oil drop which can float oil has larger grain diameter, and can float up and be separated by standing. However, the effect of the dispersed oil, emulsified oil, and dissolved oil is relatively poor by a general gravity separation method. Therefore, in the present invention, after the high-temperature digestion treatment of the wastewater, the wastewater is subjected to a high-speed centrifugation treatment to be separated into an oil phase and a first aqueous phase. After separation, the oil content in the first water phase is lower than 0.1 percent, which is convenient for subsequent process treatment; the oil-fat water content of the oil phase is lower than 2%, the purity is high, and the resource utilization degree is high, so that the oil-fat can be recycled and reutilized after separation, and certain economic benefit can be obtained.
And (4) cooling the first water phase after the oil phase and the water phase are separated, preferably cooling by heat exchange. More preferably, the first aqueous phase is conveyed back to step (1) to be subjected to heat exchange with the wastewater to be treated. On one hand, through heat exchange treatment, the first water phase can exchange heat and reduce the temperature to 45 ℃ or lower, and is convenient to enter the next step for flocculation precipitation and solid-liquid separation. On the other hand, the wastewater to be treated can be heated to 40 ℃ or higher through heat exchange, so that energy can be saved and the running cost can be reduced for subsequent high-temperature cooking treatment.
(3) Solid-liquid separation:
and (3) performing flocculation precipitation treatment on the cooled first water phase, in the process, sequentially adding quantitative medicaments into the first water phase to condition the material property, adding alkali to adjust the wastewater to a proper pH value, such as 6-9, adding a flocculating agent to condition the sludge property, and enhancing the subsequent solid-liquid separation effect. In the utility model, the flocculating agent can be inorganic or organic, for example, ferric chloride, Polyacrylamide (PAM) and the like can be adopted, and the flocculating agent can be purchased and obtained through the market. The addition amount of the flocculating agent is determined by actual experiments or debugging, and the sludge property conditioning state is also determined by debugging experiments. For example, the addition amount of the dewatered flocculant is less than 5 kg/ton of oven-dried mud, and for the sludge conditioning property, the flocculant is generally added and then stirred for 20-30 minutes.
The flocculating agent is added to lead the suspended particles to lose stability, and the colloidal particles are mutually agglomerated to lead the particles to be enlarged to form floccules, thereby being easier to separate in solid-liquid separation. The flocculating agent can be inorganic or organic, and a proportioning experiment needs to be carried out according to the field situation. The process is carried out in batches, automatic control dosing is realized by adjusting pH and quantitatively adding by a metering pump, and the addition amount of each time of other medicaments except for adding alkali is determined according to the result of a field experiment.
After the flocculation precipitation is finished, solid-liquid separation is carried out, and the solid phase and the second water phase are separated. The solid-liquid separation is to separate flocculated large-particle materials (namely solid phase) from the wastewater, preferably, a small amount of separated sludge (namely solid phase) can be returned to the distributed kitchen waste fermentation bin to be subjected to biochemical treatment together with the waste, so that the sludge is used for preparing organic fertilizers and realizing the resource utilization of the waste. For example, if 5 tons/day of kitchen waste water is treated, the amount of sludge returned to the distributed kitchen waste fermentation bin is less than 0.4 tons/day. The purpose of sludge return is mainly resource utilization, and the sludge contains a large amount of organic matters and can be returned to the fermentation bin to be composted as fertilizers to be resource utilized.
(4) Biological treatment:
the second water phase enters a biological treatment unit, the biological treatment unit utilizes a biological rotating disc treatment technology of high-efficiency filler, bottom aeration and activated carbon adsorption, and the biological rotating disc enables COD in the wastewater to be reduced by a dual microorganism degradation COD mode of culturing microorganism bacteria and attaching microorganism bacteria to the activated carbon through the filler.
The utility model discloses in, the filler that carousel adopted for example is pall ring filler, and the material is PP polypropylene, diameter 20 ~ 25mm, thickness 7 ~ 8mm, and the effect of filler is the carrier of cultivateing the microorganism.
In the present invention, the microorganism used for treating wastewater may be bacteria such as pseudomonas, bacillus, etc.; alternatively, a yeast, such as candida; alternatively, a mold such as white rot fungus, beauveria bassiana, penicillium, and the like.
In the present invention, the used bio-disc can be obtained by market purchase, for example, the bio-disc employed in the following embodiments is purchased from shanghai tesan environmental protection technology limited.
The COD value of the effluent after biological treatment is below 500, and the index reaches the effluent discharge standard. (can reach the three-level standard of sewage comprehensive discharge), and the residual sludge flows back to the solid-liquid separation system.
In a second aspect, the utility model provides a processing system of distributing type kitchen equipment waste water can be used to implement the utility model discloses the processing method of distributing type kitchen equipment waste water that provides in the first aspect. The utility model discloses a distributed kitchen equipment wastewater treatment system includes high-temperature boiling unit, water oil separating machine, solid-liquid separation unit and rotating biological disk. The units can be integrated into a skid-mounted integrated device, the occupied area is small, the civil engineering cost is low, and the investment is saved.
Specifically, as shown in fig. 2, the utility model discloses a distributed kitchen equipment wastewater treatment system includes:
(1) high temperature cooking unit
The high-temperature cooking unit comprises a heat exchanger and a high-temperature cooking pot.
The heat exchanger, for example a heat pipe heat exchanger, is used for heat exchange and temperature rise treatment of wastewater to be treated. And a waste water inlet of the heat exchanger is connected with the distributed kitchen equipment so as to receive waste water output by the distributed kitchen equipment. The waste water outlet of the heat exchanger is connected with the inlet of the high-temperature cooking tank so as to convey the waste water after heat exchange and temperature rise to the high-temperature cooking tank.
And after the high-temperature cooking tank receives the wastewater, performing high-temperature cooking treatment on the wastewater. The high-temperature cooking pot can adopt electric heating.
(2) Oil-water separator
The oil-water separator is used for separating the material obtained by the high-temperature cooking treatment into an oil phase and a first water phase. The inlet of the oil-water separator is connected with the outlet of the high-temperature cooking tank so as to receive the material output by the high-temperature cooking tank. The high-temperature water outlet of the oil-water separator is connected with the high-temperature water inlet of the heat exchanger so as to return the separated high-temperature water phase (first water phase) to the heat exchanger for heat exchange with the wastewater to be treated.
The oil-water separator may be a high speed centrifuge, such as a disk separator.
Preferably, the oil-water separator is provided with an oil phase outlet for outputting the separated oil and fat for recycling.
(3) Solid-liquid separation unit
The solid-liquid separation unit comprises a flocculation tank and a solid-liquid separator.
The flocculation tank is used for carrying out flocculation and precipitation treatment on the first water phase after cooling. The water inlet of the flocculation tank is connected with the low-temperature water outlet of the heat exchanger so as to receive the water phase subjected to heat exchange and temperature reduction treatment.
The solid-liquid separator (i.e., a dewatering device) is used for separating the material subjected to the flocculation precipitation treatment into a solid phase and a liquid phase (a second aqueous phase). The inlet of the solid-liquid separator is connected with the water outlet of the flocculation tank so as to receive the materials subjected to flocculation precipitation treatment.
Preferably, the solid-liquid separation unit further comprises a dosing device connected with a medicament inlet of the flocculation tank and used for feeding a medicament into the flocculation tank.
Preferably, the solid-liquid separation unit further comprises a pumping device arranged at the downstream of the solid-liquid separator, and the solid phase outlet of the solid-liquid separator is connected with the inlet of the pumping device. A small amount of sludge (solid phase) treated and separated by the solid-liquid separator is output from the solid-liquid separator, and is returned to the distributed kitchen waste fermentation bin by the aid of the pumping device to be subjected to biochemical treatment together with the waste. The solid-liquid separator can be a stacked screw type dehydrator, a plate-and-frame filter press or other equipment with similar functions.
(4) Biological rotating disc
The biological rotating disc is arranged at the downstream of the solid-liquid separator and used for carrying out biological treatment on a liquid phase (a second water phase) separated by the solid-liquid separator so as to enable the treated effluent index to reach the effluent discharge standard.
The utility model discloses in, biological rotating disk is the all-in-one, comprises basin and partial submergence rotary disk body in sewage, specifically, including rotary disk body, basin, dish axle and drive arrangement etc.. An aeration device is arranged in the water tank, activated carbon adsorbent is filled in the aeration device, and efficient filler is arranged on the disc surface of the rotating disc and used for culturing microorganisms.
The utility model discloses a skid-mounted formula integrated device can be integrated to distributing type kitchen equipment waste water's processing system to save the civil engineering cost, area is little. In practical application, the specific positions of the units can be reasonably selected according to the actual situation of the site, as long as the step sequence of the processing method can be satisfied.
The following description is made in conjunction with a treatment system for the distributed kitchen equipment wastewater treatment method according to a preferred embodiment of the present invention:
(1) cooking, oil extraction and sterilization:
firstly, heating the wastewater separated by the distributed kitchen equipment to 40-70 ℃. When the wastewater is treated for the first time, the wastewater is generally required to be directly heated to 65-70 ℃, and in the subsequent treatment, the wastewater can be heated to about 40 ℃ through a heat exchanger.
The heated wastewater is input into a high-temperature cooking tank through an inlet of the high-temperature cooking tank, the high-temperature cooking tank is electrically heated to completely heat the wastewater to 65-70 ℃, and the temperature is kept for 30-45 minutes, so that most of grease contained in the kitchen wastewater and suspended matters is converted into floating oil, most of bound water in materials is converted into free water, viruses, pathogenic bacteria, pathogenic microorganisms and the like in the wastewater are killed, and the effects of disinfection and sterilization are achieved.
(2) Oil-water separation:
the waste water material after high-temperature cooking is output from the high-temperature cooking tank and input into an oil-water separator, and the waste water material is separated into an oil phase and a first water phase by the oil-water separator through high-speed centrifugal treatment.
The oil-water impurity content of the separated oil phase is lower than 2%, the purity is high, and the resource utilization degree is high, so that the separated oil phase is output through an oil phase outlet of the oil-water separator for recycling.
The separated first water phase is output from the oil-water separator through the high-temperature water outlet and is conveyed to the heat pipe heat exchanger to exchange heat with the wastewater separated by the distributed kitchen equipment, so that the temperature of the first water phase is reduced to about 45 ℃ through heat exchange, and the temperature of the wastewater separated by the distributed kitchen equipment is increased to about 40 ℃. In the process of heat exchange and energy conservation, the first water phase after oil-water separation has high temperature (about 65 ℃) and can enter a subsequent treatment system after being cooled by a heat exchange system, the process adopts a heat pipe heat exchanger to carry out heat exchange between the high-temperature water phase after oil-water separation and the original liquid kitchen waste water (about 20 ℃), heat is transferred to a liquid-vapor interface from the high-temperature water phase through a shell wall and a wick filled with a liquid working medium, the liquid is evaporated on the liquid-vapor interface in an evaporation section, vapor is transferred to an original liquid section through a vapor cavity, the vapor is condensed on the vapor-liquid interface in a condensation section, the heat is transferred to the original liquid from the vapor-liquid interface in the condensation section through the wick and the shell wall, and the condensate returns to the evaporation section to work again by virtue of the capillary action of the wick. After heat exchange, the kitchen waste water can be heated to about 40 ℃, and then enters a high-temperature cooking tank, so that energy is saved for heating a subsequent cooking system, the operation cost can be reduced, and the temperature of the first water phase after oil-water separation is reduced after heat exchange and then directly enters a subsequent treatment unit.
(3) Solid-liquid separation:
the first water phase after heat exchange and temperature reduction through the tube type heat exchanger is input into the flocculation tank through the water inlet of the flocculation tank for flocculation and precipitation treatment, and in the process, alkali, a flocculating agent and the like are added into the flocculation tank through a dosing device so as to adjust the pH value of the first water phase to 6-9, condition the property of sludge and strengthen the subsequent solid-liquid separation effect.
After the flocculation precipitation is finished, the material is conveyed to a solid-liquid separator from the flocculation tank for solid-liquid separation, and is separated into a solid phase and a second water phase. A small amount of sludge (solid phase) separated by the dehydrator is output from the solid-liquid separator, and is returned to the distributed kitchen waste fermentation bin by the aid of the pumping device to be subjected to biochemical treatment together with the garbage, so that the sludge (solid phase) can be used for preparing organic fertilizers, and the resource utilization of wastes is realized.
(4) Biological treatment:
the second water phase is output by a solid-liquid separator and then enters a biological rotating disc for biological treatment. The second aqueous phase flowed from one end of the tank to the other with the tray axis above the water surface, with about 40% of the tray surface submerged in water and about 60% exposed to air. When the disk shaft rotates, the disk surface is alternately contacted with the waste water and the air. The plate surface is covered by a film-shaped object formed by the growth of microorganisms, and the biological film is alternately and fully contacted with the wastewater and the air to continuously obtain pollutants and oxygen and purify the wastewater. Shear stress is generated between the film and the disc surface due to rotation, the film is increased along with the increase of the thickness of the film, and the film falls off from the disc surface to a certain degree and flows away along with water.
The COD value of the effluent after biological treatment is below 500, and the index reaches the effluent discharge standard. (can reach the three-level standard of sewage comprehensive discharge), and the residual sludge flows back to the flocculation tank.
The heat exchange energy-saving efficiency in this example is explained in detail (taking 5 tons/day of kitchen wastewater treatment as an example):
as the working principle of the distributed kitchen equipment is that kitchen waste is treated in a sequencing batch mode, subsequent sewage outlet water is also in a sequencing batch mode, 5 tons of kitchen waste water separated from the distributed kitchen equipment firstly enters a cold water side of a heat pipe heat exchanger (the heat exchanger is a water tank provided with heat pipes, a partition plate is arranged in the middle of the water tank to divide the kitchen waste water into a cold water side and a hot water side, and the heat pipes are arranged on the partition plate) for treating 5 tons of waste water every day, the volume of the cold water side is 5m3The volume of the hot water side is 2.5m3Wherein 2.5 tons of wastewater is directly pumped into the high-temperature cooking potPerforming cooking heating and subsequent oil extraction, wherein the high-temperature water phase after oil extraction completely flows back to the hot water side of the heat pipe heat exchanger, and exchanges heat with the residual 2.5 tons of kitchen wastewater, the low-temperature water phase after heat exchange directly enters a solid-liquid separation system and other systems for subsequent standard reaching treatment, the residual wastewater heated to about 40 ℃ after heat exchange is heated and sterilized by a high-temperature cooking system, and after oil-water separation and oil extraction, the high-temperature water phase is pumped to a flocculation tank for cooling and temporarily storing until the next day for treatment; and after the production is started on the next day, mixing the cooled wastewater stored in the flocculation tank with the first 2.5 tons of wastewater subjected to cooking, oil-water separation and heat exchange on the next day, and performing subsequent solid-liquid separation and biochemical treatment, and simultaneously pumping the second batch of wastewater subjected to heat exchange, cooking and oil-water separation to the flocculation tank for cooling to the next day, and repeating the previous process. In summary, for example, 5 tons of wastewater are treated every day, wherein 2.5 tons of wastewater need to be subjected to digestion, oil-water separation, heat exchange and combination with the previous day for flocculation, solid-liquid separation and biochemical treatment, and in addition, 2.5 tons of wastewater only need to be subjected to heat exchange, digestion, oil-water separation and cooling, and then the subsequent solid-liquid separation and biochemical treatment are combined with the first batch of water for treatment on the next day. Through the heat exchange, energy is saved, and compared with the condition that the heat is not exchanged, 25% of electric energy can be saved every day.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (5)
1. The utility model provides a distributed kitchen equipment waste water's processing system which characterized in that includes:
the high-temperature cooking unit comprises a heat exchanger and a high-temperature cooking tank, wherein a wastewater outlet of the heat exchanger is connected with an inlet of the high-temperature cooking tank and is used for exchanging heat and heating the wastewater to be treated, and the high-temperature cooking tank is used for performing high-temperature cooking treatment on the wastewater to be treated;
the oil-water separator is used for separating the material obtained by the high-temperature cooking treatment into an oil phase and a first water phase, an inlet of the oil-water separator is connected with an outlet of the high-temperature cooking tank, and a high-temperature water outlet of the oil-water separator is connected with a high-temperature water inlet of the heat exchanger;
the solid-liquid separation unit comprises a flocculation tank and a solid-liquid separator, wherein a water inlet of the flocculation tank is connected with a low-temperature water outlet of the heat exchanger and used for performing flocculation precipitation treatment on the first water phase, and an inlet of the solid-liquid separator is connected with a water outlet of the flocculation tank and used for separating the first water phase into a solid phase and a second water phase;
the biological rotating disc is used for carrying out biological treatment.
2. The distributed kitchen equipment wastewater treatment system according to claim 1, wherein the solid-liquid separation unit further comprises: the dosing device is connected with a medicament inlet of the flocculation tank and is used for adding alkali and/or a flocculating agent into the flocculation tank.
3. The distributed kitchen equipment wastewater treatment system according to claim 1, wherein the solid-liquid separation unit further comprises: and the pumping device is arranged at the downstream of the solid-liquid separator and is used for returning the solid phase separated by the solid-liquid separator to the distributed kitchen equipment.
4. The distributed kitchen equipment wastewater treatment system according to claim 1, wherein the sludge outlet of the biological rotating disk is connected with the sludge inlet of the flocculation tank, so that the sludge generated by the biological rotating disk is returned to the flocculation tank.
5. The distributed kitchen equipment wastewater treatment system according to claim 1, wherein the high-temperature cooking unit, the oil-water separator, the solid-liquid separation unit and the biological rotating disc are integrated in a container and mounted by skid-mounting.
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| CN202020657367.1U CN212504451U (en) | 2020-04-26 | 2020-04-26 | Distributed kitchen equipment wastewater treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111392987A (en) * | 2020-04-26 | 2020-07-10 | 北京国能中电节能环保技术股份有限公司 | Distributed kitchen equipment wastewater treatment method and treatment system |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111392987A (en) * | 2020-04-26 | 2020-07-10 | 北京国能中电节能环保技术股份有限公司 | Distributed kitchen equipment wastewater treatment method and treatment system |
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