JP2005238119A - Sewage treatment method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sewage treatment method by which the sewage produced from a toilet, a garbage disposer or the like can be treated without the generation of malodors and solid matter can be made into a valuable resource. <P>SOLUTION: The method for performing sewage treatment by using a vacuum carbonization apparatus 18. A vacuum carbonization chamber 5 equipped with a stirrer 20 and a heating furnace 34 internally provided with an electric heater 25 for heating the vacuum carbonization chamber 5 are provided. The vacuum carbonization chamber 5 is communicatively connected to the heating furnace 24 through an ejector 29. The sewage (raw water) is introduced into the vacuum carbonization chamber 5 and the solid-component of the raw water is carbonized by heating (dry distillation) and after the evaporation steam generated at the time of the carbonization by heating is vacuum sucked and sprayed and introduced into the heating furnace 24, the raw water is passed through a thermal decomposition process and a cooling condensation process and is thereby made into the clean water. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sewage treatment method and a vacuum carbonization apparatus suitable for it. In particular, the present invention relates to a method and sewage treatment equipment suitable for treating sewage discharged from toilets and garbage disposers.

  Sewage treatment of excreta for private residences in depopulated agricultural and fishing villages is also popular in leisure areas such as campsites, ski resorts, beaches, villas, etc. Because there is not, we cope with pumping-up type or single septic tank. In the case of the draw-up type, the disposal place is restricted together with the odor, and in the case of a single septic tank, the equipment cost increases and the operation cost also increases. In particular, in the case of a single septic tank, in principle, it is a continuous operation, and is not suitable for the above-mentioned leisure area with many seasonal variations.

  In addition, the sewage treatment of temporary toilets at construction sites and event venues had the same problems as the pump-up type. In addition, a large amount of garbage is generated at campsites, ski resorts, and event venues, and odors are generated between the garbage disposal and collection, and the disposal locations are also restricted.

  In addition, as far as the present inventor knows, there is no sewage treatment method and apparatus suitable for treating such waste sewage and garbage sewage on the spot and not requiring a disposal place.

In addition, although it does not affect the inventiveness of the present invention, there is Patent Document 1 or the like previously proposed by the present inventors as a prior art document related to the vacuum carbonization apparatus used in the present invention.
JP 2000-40952 A

  In view of the above, the present invention is a sewage treatment method and sewage treatment facility capable of treating sewage discharged from a toilet, garbage disposer, etc. without generating odor and making the treated product a valuable resource. The purpose (problem) is to provide

  The sewage treatment method of the present invention solves the above problems by the following configuration.

A vacuum carbonization chamber provided with mixing means, and a hot air generation / heating furnace for heating the vacuum carbonization chamber provided with a hot air heat source, the vacuum carbonization chamber communicating with the hot air generation / heating furnace via the pressure reduction / injection means When performing sewage treatment using the reduced pressure carbonization equipment,
Waste water (raw water) is introduced into a vacuum carbonization chamber, the solid components of the raw water are heated and carbonized, and the vapor generated during the heating carbonization is sucked under reduced pressure and injected into the hot air generation / heating furnace, followed by a thermal decomposition step. In addition, the sewage treatment facility suitable for the sewage treatment method has the following configuration.

A sewage treatment facility comprising at least a sewage (raw solution) storage tank and a vacuum carbonization device,
The vacuum carbonizer
A vacuum carbonization chamber and a hot air generation / heating furnace for the vacuum carbonization chamber,
The gas generation outlet of the vacuum carbonization chamber and the hot air generation / steam inlet of the heating furnace are connected by piping via pressure reduction / injection means,
The vacuum carbonization chamber has a stock solution inlet and a carbide outlet and a mixing means.
The hot air generation / heating furnace has a gas outlet and a hot air heat source inside.

  The operation of the treatment method (sewage treatment facility) of the present invention is as follows.

  Evaporation of the sewage put into the vacuum carbonization chamber is accelerated by heating and pressure reduction, and the vaporized vapor is injected and introduced into the hot air generation / heating furnace. The atomized vaporized vapor comes into contact with the hot air generation / internal heating air heat source of the heating furnace to become superheated vapor, and the heat transfer efficiency to the reduced pressure carbonization chamber (due to an increase in temperature difference and heat transfer coefficient) is improved. Evaporation in the vacuum carbonization chamber and further carbonization (drying / dry distillation) are synergistically promoted. Furthermore, the odor component in the vapor is brought into contact with the hot air heat source and thermally decomposed, and the odor is almost eliminated.

  The hot air generation / heating furnace usually has a jacket structure with respect to the vacuum carbonization chamber. Heating not only from the bottom of the vacuum carbonization chamber but also from the entire peripheral wall promotes evaporation of raw water and carbonization (solid distillation) of the solid content.

  Many conventional bioprocessing devices have insufficient measures against odor and wastewater, but in the case of the method of the present invention (reduced pressure carbonization device), the odor is thermally decomposed and becomes odorless as described above. Moreover, if the superheated steam is cooled and condensed to be clarified water, and further used as flush water for flush toilets, it becomes possible to make a sewage closed system (completely recycled) without worrying about wastewater treatment.

  And since the carbide | carbonized_material (dry-distilled material) obtained with the sewage-treatment method (carbonization apparatus) of this invention turns into a porous carbide | carbonized_material (coke-like), a soil conditioner (for plant cultivation), a moisture regulator, a snow melting agent It becomes a valuable material such as a heat insulating agent, an adsorbent, and fuel (biomass energy), and can be recycled (recycled).

  In the carbonization apparatus of the present invention, the mixing means, the pressure reducing / injecting means, and the hot air heat source are as follows.

  The mixing means is a stirrer (fixed type) that can be continuously operated easily. It is good also as a container rotation type which rotates a carbonization chamber (connecting means, such as a rotary valve, is required).

  The decompression / injection means is an ejector (injection pump) that is simple in structure and easy to maintain. A gas transporter (compressor: including a turbo type and a positive displacement type) and an injection nozzle (spray nozzle) can be used in combination.

  The hot air heat source is usually an electric heater (resistance heater) or a burner (direct fire heating).

  Sewage (raw water) may be introduced directly from the toilet or disposer to the vacuum carbonization chamber, but from the viewpoint of ensuring optimal operation (including ensuring the decompression of the carbonization chamber), raw water (sewage; garbage) After containing the pulverized product-containing water) in a sewage storage tank (raw water storage tank), it is introduced by a transfer pump.

  It is desirable to provide the sewage storage tank with an odor outlet on the ceiling side and introduce it into a hot air generation / heating furnace by forced exhaust. As a result, the urinal discharge damper port is connected to the decompression chamber (the upper part of the sewage storage tank), so that there is no odor in the toilet and there is almost no odor when it enters. Furthermore, the odor generated from the disposer is sucked in, and the kitchen environment becomes more comfortable.

  One of the best modes will be described with reference to FIG. First, an outline will be described.

  In the reduced pressure carbonization apparatus 18 having a jacket structure, an ejector (injection pump) 29 is used in the carbonization chamber 19 as a decompression means for forced decompression, and the first fluid (power fluid) of the ejector 29 is air.

  The shape of the carbonization chamber 19 is not particularly limited, but a vertical or horizontal cylindrical shape or a reverse kamaboko type (U-shaped cross section) is suitable, and mixing means such as a stirrer 20 and a kneader (screw type) are provided internally. Has been.

  The jacket is a hot air generating / heating furnace 24, and the heat source (hot air heat source) is usually an electric heater or a burner (direct fire). Of course, induction heating or dielectric heating (in this case, provided in the carbonization chamber) can be used in combination.

  Air and generated gas (evaporated vapor and dry distillation gas) from the carbonization chamber 19 are injected and heated by the first ejector (reduced pressure injection means) 29 into the hot air generation / heating furnace 24 and heated. For this reason, in the hot air generation / heating furnace 24, the air and the generated gas are superheated and become hot air (heat medium) suitable for heating the carbonization chamber 19. And compared with an electric heater and a burner, more efficient high temperature heating is attained, and an odor component is also thermally decomposed and is not brominated.

  In addition, even if the odor gas remains without being thermally decomposed in the hot air generation / heating furnace 24, the remaining pyrolysis gas passes through the pyrolysis chambers 46 and 47 having the first and second stage heaters 48 and 49. Then, it is led to the condensing exhaust cylinder 55 having an air-cooled jacket structure in a completely pyrolyzed and non-brominated state. In the condensing exhaust cylinder 55, the gas becomes condensed water (clear water), passes through the filtration filters 60 and 60, and is stored in the washing water storage tank 11. The washing water storage tank 11 includes a new water supply mechanism (water supply pipe 64, ball tap 63) and a water supply pump 12 for supplying water to the toilet washing water tank 7.

  The toilet cleaning water is spilled from the cleaning water tank 7 and stored in the sewage water storage tank 5 when the toilet is used. In addition, raw garbage pulverized slurry (raw garbage sewage) generated from the kitchen disposer 2 is also stored in the sewage storage tank 5.

  The sewage storage tank 5 is provided with a raw water supply pump 15 for supplying sewage (raw water) to the reduced pressure carbonization device 18, and has a cover ring (substantially sealed structure) to prevent odors from spreading. In order to maintain the negative pressure, the hot air generation / heating furnace 36 communicates with the second ejector (decompression means) 36.

  Hereinafter, it will be described in more detail with reference to FIG.

  The garbage 3 is thrown into the disposer 2 attached to the sink 1, and after pulverization, the garbage sewage flows into the sewage storage tank 5 through a pipe. The disposer 2 is provided with a drain trap (not shown) so that the odor from the sewage storage tank 5 does not rise.

  In the flush toilet (toilet) 6, the wash water in the wash tub 7 is turned by turning the drain lever, the ball valve 8 is opened and the wash water flows out. At the same time, the drain lever 9 is revealed by the lever lever lever mechanism. The excrement is discharged to the raw water storage tank 5.

  When the water level in the washing water tank 7 is lowered, the washing water transfer pump 12 is operated by the signal from the level sensor 10 and supplied to the washing water tank 7 through the pipe 13. Then, when the level sensor 10 is in response to the full water signal, the washing water transfer pump 12 is stopped and the water supply is stopped.

  The raw water storage tank 5 is provided with a water level sensor 14 and a raw water transfer pump, and is connected to a reduced pressure carbonization chamber 19 of a reduced pressure carbonization device 18 via a pipe 16 having a check valve 17.

  The vacuum carbonization apparatus 18 includes a carbonization chamber 19 and a hot air generation / heating furnace 24 having a jacket structure that covers the carbonization chamber 19 with a bottom wall and a peripheral wall.

  The carbonization chamber 19 is provided with a stirring device (mixing means) 20 and a liquid level sensor 22 and a temperature sensor 23. In the illustrated example, the stirring device 20 includes a stirring blade 21 in which a number of paddles 21a are arranged on the lower surface of the horizontal rotating shaft 21b and is attached to the lower end of the stirring shaft 20a.

  The hot air generation / heating furnace 24 includes an electric heater (heat source) 25 covered with a heater protection tube 26 and a temperature sensor 28. In addition, when setting it as the apparatus for apartment houses, it is desirable for a heat source to be the burner (direct flame) heating which is easy to obtain a large amount of heat.

  Further, in the hot air generation / heating furnace 24, a discharge port 30 of a first ejector (reduced pressure injection means) 29 faces between the electric heater 25 and the bottom wall of the carbonization chamber 19 so that steam can be injected. The first fluid (driving fluid) of the ejector 29 is air from the blower 31.

  The sewage (raw water: material to be treated) composed of the pulverized slurry of raw garbage 3 and the waste-containing water 3a introduced into the carbonization chamber 19 is transmitted from the bottom wall and the peripheral wall from the jacket-structured hot air generating / heating furnace 24. Heat (the heat causes the liquid components in the sewage to evaporate and then carbonize (dry distillation) to generate dry distillation gas.

  That is, in the carbonization chamber 19, sewage rapidly evaporates due to the decompression by the first ejector 29 and the generation of hot air / heating from the heating furnace. The vaporized vapor is superheated by the first ejector 29 with a heater (or flame) or the like to become superheated vapor, and the heating efficiency for the carbonization chamber 19 is greatly increased. Furthermore, the above-mentioned dry distillation gas also becomes a superheated gas in the hot air generation / heating furnace and acts to increase the burning power of burner combustion, thereby promoting carbonization (dry distillation) in the carbonization chamber 19.

  The pressure reduction by the first ejector 29 depends on the capacity of the blower 31. The setting capability of the blower varies depending on the capacity of the carbonization chamber 5 and the required degree of decompression.

For example, when the carbonization chamber capacity is 50 L and the boiling point of raw water (sewage) is 98 to 80 ° C. and the degree of vacuum is −8 to −55 kPa, the discharge pressure is 10 to 200 kPa, the air volume is 1 to 20 m ³ / min, the power : A blower 31 of 0.1 to 7.5 kW is used. Since the blower 38 for the second ejector 29 simply sucks odor gas, it may be a negative pressure of −0.67 to −4.0 Pa (−5 to −30 mmHg).

  The main body material of the reduced-pressure carbonization device 18 is not particularly limited as long as it has heat resistance at the carbonization (dry distillation) temperature. Further, the heat insulating material to be applied to the inside and / or outside of the hot air generation / heating furnace is desirable because a heat insulating material such as ceramic fiber or rock wool is light and easy to apply. It can also be used with refractory bricks and refractory casters. It is desirable that the gas outlet 44 of the hot air generating / heating furnace 24 and the connecting pipe 45 to the pyrolysis furnaces 46 and 47 are also kept warm by the above-mentioned heat insulating material.

  Further, the raw water storage tank (sewage storage tank) 5 is provided with an odor outlet 34 for sucking odor, and the carbonization chamber 19 receives odor gas between the electric heater 25 and the bottom wall of the carbonization chamber 19. The discharge port 37 of the second ejector (decompression unit) 36 faces to enable injection. The second fluid inlet of the second ejector 36 and the odor outlet 34 are connected by a pipe 35. Note that the driving fluid (first fluid) of the second ejector 36 is air from the blower 38 as in the case of the first ejector 36. In addition, check valves 39 and 40 are interposed between the first and second ejectors 29 and 36 and the discharge ports (injection ports) 30 and 37 to prevent backflow when the blowers 31 and 38 are stopped. doing. In this case, since only ventilation is provided, odor removal may be performed using a simple gas transporter (fan, blower, compressor) instead of the second ejector 36.

  Thus, the raw water storage tank 5 has a substantially sealed structure, and the upper part of the storage tank is maintained at a negative pressure, so that no odor is trapped in the toilet through the drain damper 9 of the toilet bowl 6. Moreover, the odor gas sucked and discharged from the odor discharge port 37 is thermally decomposed in a hot air generation / heating furnace, and almost no odor is generated.

  The level sensor (water level sensor) 22 provided in the carbonization chamber 19 always detects the liquid level (water level), and when the evaporation occurs and the water level becomes low, the raw water pump 15 Operate and supply water until high water level is reached.

  After the supply / stop of the raw water is repeated and the supply of the raw water (sewage) is almost gone at night, etc., the level sensor 14 detects the low water level, and then the carbonization chamber 19 proceeds to the final carbonization (dry distillation) process. Set to move.

  Normally, carbonization (dry distillation) is completed in 1 to 2 hours after moisture is lost due to water evaporation.

  Here, a plurality of electric heaters 25 are installed, the temperature is sensed by the hot air generation / heating furnace temperature sensor 28, and energization / interruption is repeated, and the temperature is normally maintained at 400 to 500 ° C. Like that. When the temperature indicated by the carbonization chamber temperature sensor 23 rises to 200 to 250 ° C., substantially carbonization is completed (terminated).

Moreover, the rotation speed of the stirrer 20 in the carbonization chamber 5 may be about ^{1 to} 15 min ⁻¹ (average peripheral speed: 3 to 45 m / min). For this reason, the drive motor 68 of the stirrer may be a low power / high torque motor. The vertical rotary shaft 20 a of the stirrer 20 is supported by a bearing 70 with a seal, and is connected to an output shaft 68 of a drive motor 68 by a coupling 69.

  When the heat source of the hot air generation / heating furnace 24 or the pyrolysis furnace 46 is a burner (direct fire), the fuel is optionally kerosene, heavy oil, city gas, LPG, etc., and signals from the temperature sensors 28 and 52. Thus, the temperature control of the hot air generation / heating furnace 24 and the pyrolysis furnace 46 becomes possible by adjusting the fuel supply amount.

  When the carbonization is completed, the hot air generation / heating by the heater 25 and the burner of the heating furnace 24 is stopped, the blowers 31 and 38 are operated, and the inside of the carbonization chamber 19, that is, the treated product (carbide: carbonized product) is air-cooled. To do. Normally, when the treated product in the carbonization chamber 19 reaches a predetermined temperature (usually 60 ° C. or less), the rotation of the stirrer 20 is rotated in the carry-out rotation direction, and the discharge valve 41 is opened to treat the treated product. It is discharged and stored in the receiving tank 42.

  Then, the superheated steam or superheated gas 44 generated in the hot air generation / heating furnace 24 is discharged from the hot air generation / heating furnace gas outlet 44, passes through the exhaust pipe 45, passes through the pyrolysis furnaces 46, 47, and passes through the pipe 53. Connected to the exhaust stack inlet 54. The pyrolysis furnaces 46 and 47 are not necessarily required when the hot air generation / thermal decomposition of the odor in the heating furnace 24 is sufficiently performed, but it is desirable that they are present. In other words, it is possible to deal with a case where odor gas is frequently generated, and usually a plurality of stages are used.

  In the illustrated example, the heat sources of the pyrolysis furnaces 46 and 47 are electric heaters 48 and 49, but may be burners. Reference numerals 52 and 53 denote temperature sensors that emit signals for controlling the heat source. If these pyrolysis furnaces 46 and 47 are always maintained at a temperature of about 300 to 500 ° C., the raw water storage tank 5 can be deodorized even during the hot air generation / heating furnace 24 cooling operation.

  The exhaust pipe 55 includes a cooling jacket 56, and the cooling jacket 56 can be cooled with air by a blower 57, and is cooled and exhausted by forced merging at the final outlet of the cooling jacket 56 via the outlet of the exhaust pipe 55 and the merging outlet 58. It is possible.

  The evaporation gas 43 from the carbonization chamber 19 and the odor gas 43 ′ (hereinafter referred to as evaporation gas) from the raw water storage tank 5 are pyrolyzed through the hot air generation / heating furnace 24 and the pyrolysis furnaces 46 and 47, and Air cooled and discharged. At this time, water droplets generated by the air-cooled condensation of the evaporative gas drop in the exhaust tube 55 and pass through the filter medium 60 in the one-stage or multiple-stage cartridge filter 59 to become clarified water 61. In addition, as the filter medium 60, a filter cloth, chemical cotton, filter sand, ceramic balls, or the like that can be washed can be preferably used, but the carbide produced in the present invention (dried product: treated product) is also used. Is possible.

  The filtered clarified water (condensed water) 61 is stored in the clarified water storage tank 11 and can be used as toilet wash water. That is, the clarified water storage tank 11 is provided with a ball tap valve 63 for replenishing fresh water so that fresh water can be replenished, and the wash water transfer pump 12 supplies water to the wash water tank 7 via the wash water transfer pipe 13. It is possible.

  The wash water storage tank 11 includes an overflow outlet 65 in the event of an emergency, and the overflow outlet 65 is a liquid seal attached to the raw water storage tank 5 via a pipe 66. A pipe 67 is connected.

  FIG. 2 shows another embodiment of the vacuum carbonizer.

  This mode is basically performed by vacuum suction through the lower end opening of the stirring shaft, which is a hollow pipe (hollow shaft), in the vertical vacuum carbonization apparatus of FIG. The same parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted in whole or in part.

  The stirring shaft (vertical shaft) of the stirrer 20 is a hollow shaft (hollow shaft) 72, and a suction pipe 74 is connected through the hollow shaft (stirring shaft) 72 with the lower position of the vacuum carbonization chamber 19 as the suction port 20 c. ing. The tip of the suction pipe 74 is connected to a vacuum suction device (vacuum cleaner or dust collector) 73. The agitation shaft 70 is supported by a bearing 70 with a seal, and a driven pulley 77 is attached in the vicinity of the upper end. The driven pulley 77 is wound around a drive pulley 78 attached to the output shaft of the drive motor 79 (belt or chain). ). Further, the upper end of the stirring shaft 70 is connected to a processed product recovery pipe (suction pipe) 74 via a rotary joint 75. An opening / closing valve 76 is provided on the rotary joint 75 side of the suction pipe 74.

  In the case of this configuration, the agitator 20 is rotated toward the center of the processed material (carbide), and the carbide is collected in the vacuum suction device 73 via the hollow shaft 72 and the suction pipe 74.

  FIG. 3 shows still another embodiment of the reduced pressure carbonization apparatus.

  In this embodiment, the reduced pressure carbonization apparatus 19B is a horizontal type in FIG. The same parts as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted in whole or in part.

  That is, the stirring shaft is a horizontal hollow tube 72A, and a suction branch tube 72a is connected to the discharge port side of the horizontal rotating shaft 72A. The paddle of the stirrer has a shape capable of conveying the processed material (carbide) to the suction branch pipe 72 side. The stirrer may be a screw body.

  The processed material (carbide) is conveyed to the suction branch pipe 72 a side by the rotation of the stirrer 20, and is recovered by the vacuum 73 through the processed material recovery pipe 74 from the suction port of the suction branch pipe 72 a.

  In the case of the horizontal vacuum carbonization apparatus 18B, since a water level sensor cannot be installed, temperature sensors 23 and 23A are provided above and below the side wall of the carbonization chamber 19B in order to sense the water level. Detect the level of an object.

  That is, since the evaporating vapor temperature is higher than the liquid temperature, when the water level falls below the lower temperature sensor 23A, the indicated temperature of the lower temperature sensor 23A rises so that the water level can be determined. The raw water transfer pump 15 is operated by the signal.

  FIG. 4 shows still another embodiment.

  In this aspect, in the horizontal vacuum carbonization apparatus shown in FIG. 3, a processed product takeout port 81 is provided on the side wall of the carbonization chamber 18B. The same parts as those in FIG. 3 are denoted by the same reference numerals, and the description thereof is omitted in whole or in part.

  In this embodiment, the agitator 20 is rotated in the unloading direction (the processed product takeout port 81 side), and the processed product (carbide) is taken out from the processed product takeout port 81. In this embodiment, an inspection port 82 is provided on the gas outlet 32 side of the carbonization chamber 19B.

  Next, a design example for a private house (a family of 4 to 5 people) in the sewage treatment system using the reduced pressure carbonization apparatus will be described.

  For example, if the total amount of garbage disposer drainage is 10L at a time, 20L is twice a day, and the total amount of washing water and filth water in a water-saving flush toilet is 2L per time. As a result, the total is 80L for 5 people. The total amount of sewage (raw water) is 100L. Therefore, the capacity | capacitance of the raw | natural water storage tank 5 shall be about 100L.

  When carbonizing 100 L of raw water (sewage) in one day, the hot air generation / heating furnace heater 25 may be about 6 kW, and the pyrolysis furnace heater 48 may be about 1 kW.

  Moreover, each capacity | capacitance of the carbonization chamber 19 (19A) and the hot air generation / heating furnace 24 may be about 50L, respectively. It is sufficient that the washing water storage tank 11 has 10L.

  In the case of an apartment house, it is only necessary to increase the scale corresponding to the number of houses of personal housing equipment. In that case, carbonization equipment may be installed underground in relation to land or the like. The hot air generation / heating furnace heat source is preferably a burner from the viewpoint of running cost.

  Further, in the case of a temporary toilet for a construction site or an event site, the disposer drainage (garbage wastewater) is treated only with toilet sewage water. For this reason, what is necessary is just to design each apparatus according to use frequency as 2L per sewage amount.

  In the case of a private house, the toilet facility and the carbonization treatment facility may be provided separately, but in the case of a temporary toilet for a construction site, it is desirable to unitize the carbonization treatment facility below the toilet. The unit size in this case is, for example, width 1.2 m × depth 3 m × height 3 m.

  As described above, the sewage treatment method of the present invention and the vacuum carbonization apparatus suitable for it can be used by being mounted on vehicles, ships, aircraft, vehicles, etc. as well as being fixed and temporarily installed on land. In particular, in the current situation where the dumping of filth at sea is greatly restricted by the London Treaty, the benefits of loading on ships are significant.

It is a whole system figure of the sewage treatment method using the vacuum carbonization device in the present invention. FIG. 2 is a schematic system diagram in which a discharged product is a suction discharge structure in the vacuum carbonization apparatus in FIG. 1. FIG. 3 is a schematic system diagram when the vacuum carbonization apparatus in FIG. 2 is a horizontal type. FIG. 4 is a schematic system diagram in which a processed product discharge is a side wall discharge structure in the vacuum carbonizer 1 in FIG. 3.

Explanation of symbols

2 Disposer 5 Raw water storage tank (sewage storage tank)
6 Washing toilet 7 Washing water tank 11 Washing water storage tank 18, 18A Vacuum carbonization device 19 Vacuum carbonization chamber 20 Stirrer (mixing means)
24 Hot air generation / heating furnace 25 Electric heater (Heat source: Hot air heat source)
27 Burner (heat source: hot air heat source)
29 Ejector (pressure reduction / injection means)
46 Pyrolysis furnace 74 Processed material discharge piping

Claims (12)

  A reduced pressure carbonization chamber provided with mixing means; and a hot air generation / heating furnace for heating the reduced pressure carbonization chamber provided with a hot air heat source, wherein the reduced pressure carbonization chamber is connected to the hot air generation / heating furnace via a pressure reduction / injection means. When sewage treatment is performed using a vacuum carbonizer that communicates with the sewage, raw water is introduced into the vacuum carbonization chamber and the solid components of the raw water are heated and carbonized (dry distillation). A method for treating sewage, characterized in that evaporating vapor (liquid component) to be evacuated is sucked under reduced pressure and injected into the hot air generation / heating furnace, and then purified water is passed through a thermal decomposition step and a cooling condensation step.   The sewage treatment method according to claim 1, wherein the mixing means is a stirrer provided in the vacuum carbonization chamber.   The sewage treatment method according to claim 1 or 2, wherein the hot air generation / heating furnace has a jacket structure with respect to the vacuum carbonization chamber.   4. The sewage treatment method according to claim 1, wherein the pressure reducing / injecting means is an air ejector (injection pump).   5. The introduction of the sewage into the vacuum carbonization chamber is performed through a sewage storage tank (raw water storage tank) connected to a sewage discharge port such as a toilet or a garbage disposer. Sewage treatment method.   6. The sewage treatment method according to claim 5, wherein the odor from the sewage storage tank is introduced into the hot air generation / heating furnace through forced exhaust means.   The sewage treatment method according to any one of claims 1 to 6, wherein the clarified water is circulated and used as toilet wash water. A sewage treatment facility comprising at least a sewage (raw solution) storage tank and a vacuum carbonization device,
The reduced pressure carbonization apparatus comprises a reduced pressure carbonization chamber and a hot air generation / heating furnace for heating the reduced pressure carbonization chamber,
The generated gas outlet of the reduced pressure carbonization chamber and the hot air generation / steam inlet of the heating furnace are connected by piping via a reduced pressure / injection means,
The vacuum carbonization chamber has a stock solution inlet and a carbide outlet and a mixing means,
The hot air generation / heating furnace has a hot air outlet and a hot air heat source inside.
Sewage treatment equipment characterized by that.   The raw material inlet of the vacuum carbonizer is connected to the outlet of the sewage storage tank, and the odor introduction port connected to the odor vent formed on the ceiling side of the sewage storage tank through the forced exhaust means generates the hot air. The sewage treatment facility according to claim 8, wherein the heating furnace is provided.   The sewage according to claim 8 or 9, wherein a hot air outlet of the hot air generating / heating furnace is connected to a gas processing means comprising a pyrolysis furnace, a gas condensing device, and a clarified water tank, which are sequentially provided. Processing equipment.   The hot air generating furnace includes an odor introduction port connected to the undiluted solution inlet through a forced evacuation means and an odor removal port formed on the ceiling side of the sewage storage tank. The sewage treatment facility according to any one of claims 8 to 10, wherein The gas outlet of the hot-air generating furnace is connected by piping to gas processing means comprising a pyrolysis furnace, a gas condensing device, and a clarified water tank, which are sequentially provided. Sewage treatment equipment.

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