JPS5844039B2 - Human waste processing method and device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method and apparatus for treating human waste.

In order to incinerate human waste liquor in a concentrated state, when the exhaust gas from the incinerator is supplied as a heating medium to an indirect heating heat exchanger for concentrating human waste liquor, if the exhaust gas from the incinerator is directly fed into the heat exchanger, the exhaust gas A problem arises in that the inorganic salts contained in the exhaust gas adhere and accumulate on the heat transfer surface within the heat exchanger due to the temperature drop, resulting in a rapid decrease in heat exchange efficiency.

In addition, since heat exchange between exhaust gas and urine liquor is done by liquid gas method, if scale adheres to the gas side, the overall heat transfer coefficient will suddenly decrease.
Not only does the heat exchange efficiency decrease, but the heat exchanger is likely to burn out due to oxidation of the salts.

In order to solve the above-mentioned problems, the present invention adds water spray to the exhaust gas generated in the incinerator, reduces the temperature and turns it into a humid gas, and also solidifies the vapor and fume of inorganic salts by reducing the temperature to remove the inorganic salts. It is characterized by the following, and will be explained next with reference to the drawings.

The concentrated liquor receiving tank 3 includes a first chamber 1 and a second chamber 2.
Human waste liquor is always supplied to a certain level from a pipe 4.

The night soil liquid in the first chamber 1 is pressurized by a pump 5 connected to the bottom, and is supplied to the chamber 8 of the scrubber concentrator 7 through a vibro.

This scrubber concentrator 7 is equipped with a large number of water pipes 11 whose upper and lower ends are open at the upper and lower headers 9 and 10. The lower part communicates with a lower chamber 12, and the chamber 12 is connected to a mist separator 13.

The main body of the concentrator 7 includes a humid exhaust gas outlet 14 and an exhaust gas outlet 15 so as to communicate with the bottom of the external space of the group of water pipes 11.
A partition wall 17 that divides the space outside the water pipe 11 into left and right parts projects upward from the lower header 10.

A cleaning water spray nozzle 1 is installed in the upper part of the partition wall 17 and in the population 14.
8.19 are installed and these nozzles are connected to pipe 2.
0, 21, and 22 to the discharge port of the pump 23, and the suction port of the pump 23 communicates with the bottom of the condensate receiving tank 24.

The inlet 14 is connected to a humid exhaust gas outlet 27 of a temperature-reducing type inorganic salts coagulation separator 26 which coagulates and separates inorganic salts through a duct 25, and the exhaust gas outlet 15 is connected to a duct 28,
It is connected to a blowing nozzle 31 of a deodorizing furnace 30 through a blower 29, and the condensed water outlet 16 is connected to a receiving tank 24 through a pipe 32.

The bottom of the first chamber 1 is connected via a pump 34 and a pipe 35 to an inlet 37 of an evaporator 36 , and an outlet 38 of the evaporator 36 communicates via a pipe 39 to the second chamber 2 . There is concentrated furnace liquid inside.

The bottom of the second chamber 2 is connected to an atomizer 43 of an incinerator 42 through a pump 40 and a pipe 41, and a separate line 44 to an air compressor is connected to the atomizer 43, thus concentrating human waste. Furnace liquid is atomizer 4
A spray 45 is formed in the incinerator 42 from part 3.

A burner 47 that forms a flame 46 surrounding the spray 45 is attached to the incinerator 42, and this flame 46 causes the incinerator 4 to
2 becomes an atmosphere of 700° C. or higher, and the inorganic salts contained in the spray 45 evaporate and become fume-like.

The bottom of the incinerator 42 forms a residue incinerator 48,
The residue injected from the portion with a population of 49 is incinerated by the descending flame.

The outlet 50 of the incinerator 42 is still at a high temperature of about 750°C, and salts exist in the form of a fume, but this fume-like salt is transferred to the next step, the temperature-reducing inorganic salt coagulation separator 2.
6 to solidify and separate.

The separator 26 has a liquid reservoir 51 and a salt side 52 at the bottom, and a partition wall 53 rising upward from the bottom wall and a partition wall 54 projecting downward from the earthen wall form a meandering passage up and down as shown by the arrow. Cooling water spray nozzles 56, 57 are installed above the reservoir 51 and in the reservoir 55, and each spray nozzle 56, 57 is connected to the outlet of the pump 23 through a pipe 22.

The high-temperature exhaust gas discharged from the incinerator 42 is cooled at the separator 26 by water ejected from the spray nozzles 56, 57, and at the outlet 27 the temperature drops to about 140° C. and at the same time becomes humid exhaust gas.

When the temperature of the exhaust gas rapidly decreases within the separator 26 and the temperature drops below 220 to 250'C, the inorganic salts solidify and fall into the salt side 52 as shown by the dashed arrow.

The accumulated salts are discharged onto a conveyor 58 as appropriate.

59 is a conveyor for discharging scum.

A low-temperature, humid exhaust gas containing almost no inorganic salts is discharged from the outlet 27 of the separator 26, and this humid exhaust gas enters the bottom of the space outside the water pipe 11 from the portion 14 as a heating medium for the scrubber concentrator 7. It rises along a large number of water pipes 11, changes direction by a partition wall 17, descends, and reaches an outlet 15.
The air is sent to the deodorizing furnace 30 through the duct 28 and blower 29.

Note that the outlet 15 may be connected to the exhaust pipe 71. Water pipe 11
The human waste liquid supplied from the first chamber flows down, and while flowing, it receives the latent heat of steam condensation from the humid exhaust gas passing outside the water pipe and evaporates. The odor is then supplied to the deodorizing furnace 30, and in order to increase efficiency, a vacuum device may be installed between the ducts 61 to perform low-temperature evaporation.

The concentrated liquid is returned to the first chamber through the vibro 2, and as this cycle is repeated, the concentration of the night soil liquid in the first chamber 1 increases.

If a vacuum device is installed, it will be pumped.

The general structure of the deodorizing furnace 30 and the evaporator 36 will be explained.

The deodorizing furnace 30 has roughly the same structure as the incinerator 42,
64 is a burner, 65 is a nozzle, 66 is an exhaust gas outlet,
This outlet 66 is connected via a duct 67 to an exhaust gas inlet 68 of the evaporator 36 .

The exhaust gas outlet 69 of the evaporator 36 is connected to an exhaust pipe 71 through an exhaust fan 70, and the steam output lower 2 is connected to a nozzle 65 through a duct 73.

As explained above, the human waste concentrated liquor in the second chamber 2 is ejected from the atomizer 43 to the incinerator 42 and is incinerated.
The obtained high-temperature exhaust gas is not directly supplied to the scrubber condenser 7, but is first supplied to the cooling type inorganic salt coagulation separator 26.
The cooling water supplied from the spray nozzles 56 and 57 cools the temperature from approximately 750°C at the inlet 55 to the outlet 2.
Since the temperature is rapidly reduced to about 140° C. in the 7th section, when the temperature drops below 220 to 250° C., the inorganic salts in the exhaust gas solidify and accumulate in the salt side 52.

Therefore, the exhaust gas supplied to the indirect heating scrubber concentrator 7 has a low temperature of approximately 140°C and is humid.
Combined with the action of the washing water added from the spray nozzles 18 and 19, it quickly condenses on the outer surfaces of the many water pipes 11, and heat exchange in the concentrator 7 approaches a liquid-liquid type, resulting in an overall heat transfer coefficient. increases significantly, improving heat exchange efficiency.

Furthermore, since inorganic salts do not adhere to the surface of the water pipe 11, it is possible to reliably prevent the heat transfer surface from becoming fouled and the heat exchange efficiency from decreasing due to the contamination.

Furthermore, since the temperature of the exhaust gas supplied to the concentrator 7 is sufficiently low,
There is no fear of burnout of the concentrator 7, and the durability of the device is improved.

The exhaust gas temperature discharged from the outlet 15 of the concentrator 7 is 60~
The temperature is as low as 70° C., and it may be discharged directly into the atmosphere without being supplied to the deodorizing furnace 30.

[Brief explanation of drawings]

The figure is a schematic structural diagram showing the main parts of the device according to the invention in longitudinal section. 3... Concentrated liquor receiver tank, 7... Scrubber concentrator (indirect heating heat exchanger), 26... Temperature reduction type inorganic salt coagulation separator, 42... Incinerator, 56.57... Water spray nozzle.

Claims (1)

[Claims] 1. A humid exhaust gas with a reduced salt content after incinerating a concentrated liquor of human waste and removing solidified salts by adding water spray to the exhaust gas and reducing the temperature to the freezing point of inorganic salts. A method for treating human waste, characterized in that it is introduced as a heating medium into an indirect heating heat exchanger for concentrating liquor liquid. 2. A concentrated tear tank, an incinerator that incinerates concentrated PM in the liquor receiver, and a temperature-reducing inorganic salts system that cools and separates inorganic salts by adding water spray to the incinerator exhaust gas. A human waste processing device that includes a coagulation separator and an indirect heating heat exchanger for concentrating the filtrate using humid exhaust gas from the separator as a heating medium.