JP2000325996A - Sludge heat treatment apparatus and modifying method of formed oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the amt. of formed oil obtained from sludge and to enable even the modification of the formed oil. SOLUTION: Dried sludge is heat-treated in a gasifying part to obtain a gaseous product 12 and waste oil is added to a liquid 13 obtained by condensing the oily substance of the gaseous product 12 and the resulting mixture is heated by a heater to obtain a gaseous product 15 containing the waste oil component in a gasified state. This gaseous product 15 and the residue 16 generated in the gasifying part 3 are introduced into a reaction part 8 to be heat-treated and reacted to obtain a gaseous product 18a which is, in turn, introduced into a condensation and separation part 9 to obtain formed oil 19 of which the amt. is increased at least by the addition amt. of the waste oil. The high-order heat value of the obtained formed oil 19 becomes a large value as compared with such a case that no waste oil is added.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge heat treatment apparatus for performing a heat treatment on dry sludge made of, for example, sewage sludge to obtain a product oil such as diesel engine fuel, and a method of reforming the product oil. Things.

[0002]

2. Description of the Related Art As a technique for recycling waste edible oil, which is a kind of waste oil, there are a method of adding caustic soda to soap and a method of converting it into a light oily substance which is used as a fuel for a diesel engine. The principle of conversion to light oily substances is that after removing solid substances from waste edible oil, alcohol and a catalyst are added, followed by heating to convert to ester. Although these methods are effective as recycling technologies,
The former requires the development of soap demand and the latter requires dedicated equipment, alcohol and catalyst. In addition, glycerin is produced as a by-product.

[0003] On the other hand, there is a technology for heat-treating sludge containing a relatively large amount of organic components such as sewage sludge to produce oil. The oil generated by heat treatment from sewage sludge using such a technology has an elemental composition roughly as shown in FIG. 12, and 25 to 35% of the organic component is converted into oil, and a high calorific value (total heat generation) is obtained. Is from 7000 to 9500 kcal / kg. FIG. 12 shows the elemental composition and the higher calorific value of the product oil obtained using the sewage sludge using the lime coagulant and the sewage sludge using the polymer coagulant, respectively. On the other hand, the higher calorific value of light oil is 11500 kcal / kg,
It can be seen that the product oil obtained from the sludge has a slightly lower value.

[0004] As an example of the prior art, a method for converting organic sludge-like substances disclosed in Japanese Patent Publication No. 4-66917 will be briefly described with reference to FIG.
As shown in FIG. 13, first, dehydrated sludge is sent from a dewatered sludge storage tank 101 to a dryer 102 to be sufficiently dried to obtain dried sludge. Next, the dried sludge is introduced into the pyrolysis furnace 103 and pyrolyzed at a temperature of 150 to 450 ° C. to obtain a small amount of noncombustible gas, a large amount of oil, and a residue. The non-combustible gas obtained here is sent to a waste gas treatment step 104, and the oil is stored in an oil storage tank 105 and recovered as energy.
Further, a part of the oil is sent from the oil storage tank 105 to the dry sludge to be mixed and impregnated therein, and is again mixed with the sludge in the pyrolysis furnace 10.
3 is introduced. The residue is used as a heat source for the dryer 102 and the pyrolysis furnace 103.
And burned to ash.

[0005] According to the above-mentioned technique, the yield of oil can be improved by adjusting the treatment temperature during the thermal decomposition of sludge to a relatively low temperature of 150 to 450 ° C.
In addition, there is an advantage that the time required for thermal decomposition can be reduced by mixing the generated oil with the dried sludge and using it as a heat transfer medium.

[0006] However, in the method of adding the produced oil to the dried sludge, although the effect of shortening the pyrolysis time is obtained, a part of the generated oil added to the dried sludge is thermally decomposed during the heat treatment. There is also a problem that the amount of generated oil finally obtained is reduced due to a non-condensable gas due to a catalytic reaction with the residue.

When the content of organic components in sludge such as sludge using a lime coagulant or digested sludge as dry sludge is close to about 70% or less, a high heating value of 800 is obtained.
Product oil yields above 0 kcal / kg remained below 20% (% by weight). Furthermore, although a difference also occurs depending on the components of the dried sludge and the heat treatment conditions, the higher calorific value of the generated oil obtained from the sludge by the conventional method is 7000 to 950.
It is in the range of 0 kcal / kg, which is lower than that of heavy oil, etc., and energy improvement was desired. On the other hand, waste cooking oil and waste lubricating oil
Wastes are being treated at high cost, and low-cost processing or recycling (regeneration) has been desired.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the quality of a product oil obtained by a heat treatment is improved by adding waste oil in a sludge treatment process. The present invention provides a technique capable of improving and increasing the amount of produced oil.

[0009]

SUMMARY OF THE INVENTION A sludge heat treatment apparatus according to the present invention is configured to add waste oil to a sludge heat treatment apparatus for subjecting dried sludge to heat treatment to obtain a generated oil.

[0010] The sludge heat treatment apparatus according to the present invention comprises:
A sludge feeder that supplies dry sludge, a heat treatment is performed by introducing the dry sludge, and a vaporization unit that converts the sludge into a first gaseous product and a first residue, and the first gaseous product A gas separation unit for separating into a second gaseous product composed of an oily substance and a substance other than the oily substance, and a heat treatment performed by introducing the first residue and the oily substance, A reaction section for converting the gaseous product and the second residue, the second gaseous product and the third gaseous product are introduced, condensed, and condensed to obtain a product oil by performing a separation process. A separation section is provided, and waste oil is added to the oily substance.

Further, in the sludge heat treatment apparatus according to the present invention, in the above-described configuration, the gas separation unit includes a condenser for condensing an oily substance of a first gaseous product, and the condenser condensed in the condenser. A gas-liquid separator for separating an oily substance (liquid or gas) and a second gaseous product remaining without being condensed; and vaporizing the oily substance separated by the gas-liquid separator by heating. A waste oil is added to the oily substance separated by the gas-liquid separator.

Further, a sludge heat treatment apparatus according to the present invention comprises:
In the configuration as described above, the gas separation unit includes a condenser that condenses the oily substance of the first gaseous product, the oily substance that is condensed in the condenser, and a second that remains without being condensed. A gas-liquid separator for separating gaseous products, and a heater for vaporizing by heating the oily substance separated by the gas-liquid separator, for the oily substance vaporized by the heater And vaporized waste oil.

Further, the sludge heat treatment apparatus according to the present invention is a sludge feeder for supplying dried sludge, and heat-treated by introducing the dried sludge to convert the sludge into a first gaseous product and a first residue. A vaporizing section, a reaction section for introducing the first gaseous product and the first residue and performing a heat treatment to convert the gaseous product into a fourth gaseous product and a second residue; and A condensing / separating section for introducing a fourth gaseous product and subjecting it to condensation and separation to obtain a produced oil, wherein waste oil vaporized is added to the first gaseous product.

Further, a sludge heat treatment apparatus according to the present invention
In the above configuration, waste oil is added to dry sludge.

Further, in the sludge heat treatment apparatus according to the present invention, the waste oil is added to the treatment chamber during the heat treatment in the reaction section instead of adding the waste oil to the oily substance in the above configuration.

Further, the sludge heat treatment apparatus according to the present invention comprises:
In the above configuration, instead of adding the vaporized waste oil to the first gaseous product, the waste oil is added to the processing chamber during the heat treatment in the reaction section.

Further, in the sludge heat treatment apparatus according to the present invention, in the above configuration, the vaporization section and the reaction section are constituted by a discontinuous processing chamber, and the first gaseous product is exhausted to the gas separation section. The first residue is discharged to the reaction section via a valve provided between the vaporization section and the reaction section, and a backflow of the processing substance from the gas separation section or the reaction section to the vaporization section is generated. It is to be suppressed.

Further, the sludge heat treatment apparatus according to the present invention comprises:
In the above configuration, the vaporization section and the reaction section are constituted by a discontinuous processing chamber, the first gaseous product is exhausted to the reaction section, and the first residue is the reaction between the vaporization section and the reaction section. The gas is discharged to the reaction section via a valve provided between the sections, and the backflow of the processing substance from the gas separation section or the reaction section to the vaporization section is suppressed.

Further, in the sludge heat treatment apparatus according to the present invention, in the above-described configuration, the waste oil uses waste edible oil or waste lubricating oil.

[0020] Further, the method for reforming produced oil according to the present invention comprises the steps of introducing dry sludge from a sludge feeder into a vaporization section;
A step of converting the dried sludge into a first gaseous product and a first residue by performing a heat treatment in the vaporization section, introducing the first gaseous product into a gas separation section, A step of separating into a second gaseous product consisting of other substances, a step of adding waste oil to the oily substance to vaporize, a vaporized mixed gas of the oily substance and waste oil and the first residue A step of introducing into the reaction section and performing a heat treatment to convert it into a third gaseous product and a second residue, and condensing and separating the second gaseous product and the third gaseous product And a step of obtaining a produced oil by performing condensation and separation treatments.

Further, in the method for reforming a product oil according to the present invention, in the above-described method, the oily substance introduced into the reaction section is obtained by converting the first gaseous product into a condenser constituting a gas separation section. After being introduced and condensed to obtain a liquid composed of an oily substance, waste oil is added to the liquid separated in the gas-liquid separator forming the gas separation section, and using a heater forming the gas separation section. It is obtained by vaporization by heating.

Further, the method for reforming a produced oil according to the present invention comprises the steps of introducing dry sludge from a sludge feeder into a vaporization section;
A step of converting the dried sludge into a first gaseous product and a first residue by performing a heat treatment in the vaporizing section, a step of adding waste oil vaporized to the first gaseous product, A step of introducing one gaseous product and the first residue into the reaction section and performing a heat treatment to obtain a fourth gaseous product and a second residue; The method includes a step of introducing a substance into the condensation / separation section and performing a condensation / separation process to obtain a produced oil.

Further, the method for reforming a produced oil according to the present invention is the same as the above method, except that the step of adding waste oil to any of an oily substance, a liquid composed of the oily substance, and the first gaseous product is performed. And adding the waste oil to the dried sludge.

[0024] Further, the method for reforming a produced oil according to the present invention is different from the above-described method in that a waste oil is added to any of an oily substance, a liquid composed of an oily substance, and a first gaseous product. And the step of adding the waste oil to the treatment chamber during the heat treatment in the reaction section.

Further, the method for reforming a produced oil according to the present invention uses waste edible oil or waste lubricating oil as waste oil.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. The present invention relates to a sludge heat treatment apparatus for subjecting dried sludge obtained by drying sewage sludge or the like to heat treatment to obtain a generated oil, and a generated oil using the sludge heat treatment apparatus. It is based on the finding that by adding waste oil in the process of treating sludge, it is possible to obtain a product oil having a higher calorific value than when no waste oil is added. It is based on the finding that in the sludge heat treatment apparatus, the energy efficiency and the yield of the generated oil are increased by selecting the position where the waste oil is added.

FIG. 1 shows a conceptual diagram of a sludge heat treatment apparatus according to Embodiment 1 of the present invention. In FIG.
a is a sludge heat treatment apparatus, and this sludge heat treatment apparatus 1a has the following configuration. First, dry sludge 11 is supplied by a sludge supply device indicated by reference numeral 2 and is introduced into the vaporization section 3 set at a predetermined reaction temperature. A gaseous product 12 corresponding to the first gas product generated in the vaporization section 3 is introduced into a gas separation section 7 including a condenser 4, a gas-liquid separator 5, and a heater 6, and a gaseous product 12 generated in the vaporization section 3 is formed. The residue 16 corresponding to one residue is introduced into the reaction section 8. In the gas separation unit 7, the gaseous product 12 is turned into a liquid 13 by processing an oily substance by the condenser 4, and the liquid 13 separated in the gas-liquid separator 5 is vaporized by the heater 6 to form a gas composed of the oily substance. It becomes a state product 15 and is introduced into the reaction section 8.

The residue 16 reacts with the gaseous product 15 in which the oily substance is vaporized by heat treatment in the reaction section 8 set at a predetermined temperature, and the gaseous product corresponding to the third gaseous product is formed. 18a and a residue 17 corresponding to the second residue. A gaseous product 14 corresponding to a second gaseous product made of a substance other than an oily substance separated in the gas-liquid separator 5 and a gaseous product 18 generated in the reaction section 8
a is introduced into the condensing / separating section 9 and the product oil 19 and the reaction water
0, condensed and separated into non-condensable gas 21. Further, an arrow indicated by reference numeral 10 indicates a waste oil addition position, and indicates that waste oil is added to the liquid 13 separated by the gas-liquid separator 5 of the gas separation unit 7. Although not shown in FIG. 1, it is assumed that waste oil is supplied by, for example, a waste oil supply device.

With reference to FIG. 1, the method for obtaining product oil from sludge will be described in more detail. First, as the dried sludge 11 supplied from the sludge feeder 2, a sufficiently dried sludge having a solid content of 80% or more is used. The sludge is introduced into the vaporizing section 3 heated to a temperature of 250 to 500 ° C. in a normal pressure and low oxygen atmosphere, and heated to form a gaseous product 12 in which organic components and moisture in the sludge are vaporized; Is converted into a residue 16 and discharged.

The gaseous product 12 is introduced into the condenser 4 of the gas separation section 7, and the oily substance, which is a condensable component, is condensed in the condenser 4 to become a liquid 13, and is separated from substances other than the oily substance. And a gaseous product 14. Thereafter, the liquid 13 and the gaseous product 14 are separated in the gas-liquid separator 5, and then the waste oil (not shown) is separated from the liquid 13 separated in the gas-liquid separator 5 (at the waste oil addition position 10). After adding and mixing, for example, waste edible oil as waste oil from the feeder, the mixture is heated and vaporized by the heater 6 to obtain a gaseous product 15 containing waste oil components.

Next, the gaseous product 15 obtained in the gas separation section 7 and the residue 16 obtained in the vaporization section 3 are reacted under normal pressure and low oxygen atmosphere at 250 to 500 ° C. Introduced to part 8. By this heat treatment, a reaction such as deamination proceeds, and in both cases, gas molecules are reduced in molecular weight, and an oily substance having a low boiling point and a low viscosity is obtained. In the reaction section 8, a gaseous product 18a containing these low molecular weight oily substances and a residue 17 are generated, and the residue 17 is discharged to the outside.

The gaseous product 18a containing a low molecular weight oily substance and the gaseous product 14 separated by the gas-liquid separator 5 of the gas separation unit 7 are introduced into the condensation / separation unit 9, where they are introduced. A condensed and separated treatment is performed to obtain a product oil 19 which can be used as a diesel engine fuel. In addition, a reaction water 20 which is an aqueous solution containing an organic acid, and a non-condensed which is a combustible gas mainly containing carbon dioxide Gas 21 is exhausted.

Next, formed oil 19 obtained by adding waste oil,
FIG. 2 shows a table comparing the quality with the product oil obtained without adding waste oil. As shown in this table, as the type of sludge, dry sludge using a common lime coagulant was used. The moisture content of the dried sludge was 2.0% for the case where waste oil was added, and 0.4% for the case where no waste oil was added. is there. The amount of dried sludge was 10.1 kg for waste oil added and 10.1 kg for waste oil not added.
It was 7 kg. Further, waste cooking oil was used as waste oil to be added, and the sludge heat treatment temperature was 400 to 450 ° C.

The sludge heat treatment is performed by the method as described above, and waste oil is added to the liquid 13 separated in the gas-liquid separator 5 of the gas separation unit 7. 1.81kg including 0.5kg
(In FIG. 2, an asterisk (*) indicates that a waste oil amount of 0.5 kg was contained.), And the yield of the produced oil was 12.2%.
On the other hand, when no waste oil was added, the amount of product oil obtained was 1.2 kg, and the yield of product oil was 11.4%. The higher calorific value of the product oil 19 obtained by adding waste oil was 9240 kcal / kg, whereas that of the product oil without added waste oil was 8950 kcal / kg. From the above results,
By adding the waste oil, it is possible to recover at least the generated oil by the weight of the added waste oil,
Furthermore, it was found that the higher calorific value of the obtained product oil could be set to a larger value, and that the product oil could be reformed.

Thus, at the waste oil addition position 10,
By simply adding waste oil, the amount of produced oil can be increased, and it is possible to convert the produced oil to a higher quality, ie, a higher calorific value, than the produced oil when no waste oil is added.
Note that, in the above example, a case where waste cooking oil is used as waste oil has been described, but industrial waste oil such as waste lubricating oil can also be used.

According to the present invention, waste oil is converted to oil quality that can be used as a diesel engine fuel, so that waste oil can be treated without increasing sludge treatment costs, in other words, with little waste oil treatment costs. Can be
Moreover, it is possible to obtain an effect that the waste oil can be regenerated as a diesel engine fuel.

Second Embodiment Next, a second embodiment of the present invention will be described. In the first embodiment, the gas separation unit 7
Although the case where the waste oil in a liquid state is added to the liquid 13 separated in the gas-liquid separator 5 described above has been described, the waste oil addition position may be different. In the second embodiment, a case where another waste oil addition position is set will be described.

FIG. 3 is a conceptual diagram of the sludge heat treatment according to the second embodiment, where reference numeral 22 indicates a waste oil addition position, and other reference numerals which are the same as those already used for the description.
Or it shows a corresponding part. Waste oil addition position 22
Is located before the dried sludge 11 supplied from the sludge feeder 2 is introduced into the vaporization section 3.

Waste oil is added to the dried sludge 11, and then the same treatment as that described in the first embodiment is performed in the vaporization section 3, gas separation section 7, reaction section 8, and separation and condensation section 9 respectively. In addition, the amount of generated oil can be increased as compared with the case where no waste oil is added, and the obtained generated oil can be reformed.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG. As shown in FIG. 4, it is assumed that the waste oil addition position 23 is located after the gaseous product 15 composed of an oily substance is obtained by the gas separation unit 7 and before it is introduced into the reaction unit 8. Waste oil addition position 23
In the above, waste oil must be heated and vaporized in order to add waste oil. Therefore, a waste oil feeder (not shown) needs a waste oil heating and vaporizing function. Also in the case of the third embodiment, as in the case of the first and second embodiments, the amount of generated oil can be increased, and the obtained generated oil can be reformed.

Embodiment 4 Next, Embodiment 4 of the present invention will be described with reference to FIG. Embodiment 4
5 shows another waste oil addition position. The waste oil addition position 24 shows a case where waste oil is directly added into the processing chamber of the reaction section 8 as shown in FIG. Also in this case, similarly to Embodiments 1 to 3 described above, the amount of generated oil can be made larger than when no waste oil is added, and the resulting generated oil can be reformed. It is. Also, as shown in FIG. 6, the same effect can be obtained by adding waste oil to the residue 16 at the waste oil addition position indicated by reference numeral 25.

Fifth Embodiment Next, a fifth embodiment of the present invention will be described. The sludge heat treatment apparatus 1a shown in the first to fourth embodiments has the gas separation unit 7, but the sludge heat treatment apparatus 1b described in the fifth embodiment has a gas separation unit 7 as shown in FIG. And the gaseous product 12 vaporized in the vaporization section 3 is introduced into the reaction section 8 without being separated. In addition, in FIG. 7, reference numeral 26 indicates a waste oil addition position, and in this case, indicates that waste oil is added to the gaseous product 12 obtained in the vaporization unit 3. Reference numeral 18a denotes a gaseous product corresponding to the fourth gaseous product in the gaseous product generated in the reaction section 8. However, in this case, since waste oil is added to the gaseous product 12, it is necessary to vaporize the waste oil by heating or the like, and it is difficult to directly add the waste oil in a liquid state.

As described above, the sludge heat treatment apparatus 1b having no gas separation unit 7 can be finally obtained by adding waste oil such as waste cooking oil or waste lubricating oil in the process of treating sludge. It is possible to increase the amount of the generated oil 19 and improve the quality of the generated oil 19.

Embodiment 6 Next, Embodiment 6 of the present invention will be described with reference to FIG. In FIG. 8, reference numeral 27 indicates a waste oil addition position. Using the sludge heat treatment apparatus 1b without the gas separation unit 7 to produce oil 1
As shown in FIG. 8, even when waste oil is added to the dried sludge 11 supplied from the sludge feeder 2, as shown in FIG. It is possible to increase the amount and also to reform the product oil 19.

Seventh Embodiment Next, a seventh embodiment of the present invention will be described with reference to FIGS. 9 and 10, reference numerals 28 and 29 indicate waste oil addition positions, respectively. As shown in FIG. 9, by adding waste oil directly into the treatment chamber of the reaction unit 8 of the sludge heat treatment apparatus 1 b not having the gas separation unit 7, the amount of the finally obtained product oil 19 can be increased. Is possible,
It is also possible to reform the generated oil 19. Also,
As shown in FIG. 10, the residue 16 generated in the vaporization section 3
On the other hand, the same effect can be obtained by adding waste oil before the heat treatment is performed in the reaction section 8.

Eighth Embodiment Next, an eighth embodiment of the present invention will be described with reference to FIG. FIG. 11 (a)
Are the vaporization unit 3 and the reaction unit 8 that constitute the sludge heat treatment apparatus 1a having the gas separation unit 7 described in the first to fourth embodiments.
It is a conceptual diagram which shows the relationship with. In FIG.
Reference numeral 0 denotes a rotary valve, and by disposing a rotary valve 30 between the vaporizing section 3 and the reaction section 8, residue 16 generated in the vaporizing section 3 is transferred to the reaction section 8 side.
It can be introduced without backflow. The gaseous product 12 generated in the vaporizing section 3 is separated from the gas
Introduced on the side. By interposing the rotary valve 30 between the processing chambers, the gas does not move from the reaction section 8 to the vaporization section 3, and the gaseous product 15 separated in the gas separation section 7 is different from the residue 16. It is introduced into the reaction section 8 by a route.

Further, as shown in Embodiments 5 to 7,
In the case of the sludge heat treatment apparatus 1b not provided with the gas separation unit 7, as shown in FIG. 11B, the residue 16 generated in the vaporization unit 3 is introduced into the reaction unit 8 via the rotary valve 30, The gaseous product 12 is introduced into the reaction section 8 by another route. In addition, similarly to the above case, the reaction unit 8
In order to prevent the gas from flowing back into the vaporizing section 3 from behind, the flow of the gas is adjusted so as to be always in one direction.

As described above, the processing chamber of the vaporizing section 3 and the reaction section 8 is made discontinuous, and the gas is adjusted so as to flow only in the forward direction (the direction from the vaporizing section 3 side to the reaction section 8 side). As a result, efficient processing can be performed, and the energy required for the processing can be reduced. It is needless to say that a similar effect can be obtained even when a valve other than the rotary valve is used.

[0049]

According to the present invention, since the sludge heat treatment apparatus has a waste oil addition function, by using this sludge heat treatment apparatus and adding waste oil during the treatment of dry sludge, the product finally obtained is obtained. It is possible to increase the amount of oil,
Further, the quality of the generated oil can be improved.

Further, according to the present invention, since the sludge heat treatment apparatus is configured to add waste oil to the oily substance separated in the gas separation section, it is possible to increase the amount of oil finally obtained. And the quality of the produced oil can be further improved.

Further, according to the present invention, since the sludge heat treatment apparatus is configured to add waste oil to oil condensed in the gas separation section, it is possible to add liquid waste oil to liquid oil. It is possible to smoothly add waste oil, and it is possible to increase the amount of finally obtained oil by at least the amount of added waste oil, and to further improve the quality of generated oil. Becomes possible.

Further, according to the present invention, the sludge heat treatment apparatus is configured to vaporize the oily substance condensed in the gas separation section and then to add the vaporized waste oil, so that it is finally obtained. The amount of generated oil can be increased, and the quality of generated oil can be further improved.

Further, according to the present invention, the sludge heat treatment apparatus is configured to add the vaporized waste oil to the first gaseous product generated in the vaporization section, so that the finally obtained product oil is obtained. Volume can be increased,
Further, the quality of the generated oil can be improved.

Further, according to the present invention, since the sludge heat treatment apparatus is configured to add waste oil to dried sludge, it is possible to increase the amount of oil finally obtained, The quality of the produced oil can be improved.

Further, according to the present invention, the sludge heat treatment apparatus is configured to add waste oil directly to the treatment chamber during heat treatment in the reaction section, so that the amount of finally produced oil can be increased. It is possible to further improve the quality of the produced oil.

Further, according to the present invention, the vaporization section and the reaction section constituting the sludge heat treatment apparatus are constituted by discontinuous processing chambers, and the first residue generated in the vaporization section via the valve is sent to the reaction section. Discharge, the first gaseous product generated in the vaporization section is discharged to the gas separation section, the first residue on the vaporization section side, the first gaseous product is adjusted so as not to flow back. Therefore, heat treatment can be performed efficiently, and the energy required for the heat treatment can be reduced.

Further, according to the present invention, the vaporization section and the reaction section constituting the sludge heat treatment apparatus are constituted by discontinuous processing chambers, and the first residue generated in the vaporization section via the valve is sent to the reaction section. Discharging, further discharging the first gaseous product generated in the vaporization section to the reaction section, the first residue on the vaporization section side, the first gaseous product is adjusted so as not to flow backward. Therefore, heat treatment can be performed efficiently, and the energy required for the heat treatment can be suppressed to a small value.

Further, according to the present invention, in the sludge heat treatment apparatus, waste cooking oil or waste lubricating oil can be used as the waste oil to be added, and the amount of finally produced oil can be increased. It is possible to further improve the quality of the produced oil. Further, waste edible oil or waste lubricating oil which is costly disposed of can be converted into useful diesel engine fuel.

Further, the reforming method of the formed oil according to the present invention includes a step of separating the first gaseous product in a gas separation section to obtain an oily substance, and then adding a waste oil to the oily substance. By adding waste oil in the heat treatment process of sludge, it is possible to increase the amount of product oil finally obtained, and to further improve the quality of product oil.

Further, in the method for reforming the formed oil according to the present invention, the oily substance of the first gaseous product is condensed in the gas separation section and the liquid waste oil is separated at the stage where the liquid oily substance is separated by gas-liquid separation. And the step of adding waste oil can be performed smoothly. Further, it is possible to increase the amount of the finally obtained oil by at least the amount of the added waste oil, and it is possible to further improve the quality of the generated oil.

Further, the method for reforming the formed oil according to the present invention includes a step of adding the vaporized waste oil to the first gaseous product generated in the vaporizing section, and It is possible to increase the amount of oil,
Further, the quality of the generated oil can be improved.

Further, the method for reforming the produced oil according to the present invention includes a step of adding waste oil to the dried sludge, and it is possible to increase the amount of the finally produced oil, Quality can be improved.

Further, the method for reforming a produced oil according to the present invention includes a step of directly adding a waste oil to a treatment chamber in a reaction section, and it is possible to increase the amount of a finally obtained produced oil. In addition, the quality of the produced oil can be further improved.

Further, in the method of reforming the formed oil according to the present invention, it is possible to use waste edible oil or waste lubricating oil as the waste oil to be added in the heat treatment process of the sludge, and to obtain the finally obtained product oil. The amount can be increased, and the quality of the produced oil can be further improved. Further, waste edible oil or waste lubricating oil which is costly disposed of can be converted to useful diesel engine fuel.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a sludge heat treatment apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a diagram necessary for explaining the first embodiment of the present invention;

FIG. 3 is a conceptual diagram of a sludge heat treatment apparatus according to Embodiment 2 of the present invention.

FIG. 4 is a conceptual diagram of a sludge heat treatment apparatus according to Embodiment 3 of the present invention.

FIG. 5 is a conceptual diagram of a sludge heat treatment apparatus according to Embodiment 4 of the present invention.

FIG. 6 is a conceptual diagram of a sludge heat treatment apparatus according to Embodiment 4 of the present invention.

FIG. 7 is a conceptual diagram of a sludge heat treatment apparatus according to Embodiment 5 of the present invention.

FIG. 8 is a conceptual diagram of a sludge heat treatment apparatus according to Embodiment 6 of the present invention.

FIG. 9 is a conceptual diagram of a sludge heat treatment apparatus according to Embodiment 7 of the present invention.

FIG. 10 is a conceptual diagram of a sludge heat treatment apparatus according to Embodiment 7 of the present invention.

FIG. 11 is a conceptual diagram showing a part of a sludge heat treatment apparatus according to Embodiment 8 of the present invention.

FIG. 12 is a diagram necessary for explaining a conventional technique.

FIG. 13 is a diagram showing a conventional technique.

[Explanation of symbols]

1a, 1b sludge heat treatment device, 2 sludge feeder, 3
Vaporization section, 4 condenser, 5 gas-liquid separator, 6 heater, 7 gas separation section, 8 reaction section, 9 condensation separation section, 10 waste oil addition position, 11 dry sludge, 12,
14, 15, 18a, 18b gaseous products, 13
Liquid, 16, 17 residue, 19 generated oil, 20 reaction water, 21 non-condensable gas, 22, 23, 24, 25,
26, 27, 28, 29 Waste oil addition position, 30 Rotary valve.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shigeki Nakayama 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Corporation (72) Inventor Saburo Matsui 10-45 F-term in Hanazono-Uchihatacho, Ukyo-ku, Kyoto-shi (Reference) 4D059 AA03 BB03 BD00 CC03 DA57 DB31

Claims (17)

[Claims] 1. A sludge heat treatment apparatus for applying heat treatment to dried sludge to obtain a generated oil, wherein waste oil is added to the sludge heat treatment apparatus. 2. A sludge feeder for supplying dry sludge, a vaporizing section for introducing the dry sludge and performing heat treatment to convert the sludge into a first gaseous product and a first residue. Introducing the gas separation unit for separating the gaseous product into a second gaseous product composed of an oily substance and a substance other than the oily substance, and introducing the first residue and the oily substance (liquid or gas) And heat-treated to introduce a third gaseous product and a second residue into a reaction section, and the second gaseous product and the third gaseous product are introduced, condensed and separated A sludge heat treatment apparatus, comprising: a condensation / separation section for obtaining a produced oil by performing a treatment; and adding waste oil to the oily substance. 3. A gas separation unit comprising: a condenser for condensing an oily substance of a first gaseous product; an oily substance condensed in the condenser; and a second gaseous substance remaining without being condensed. A gas-liquid separator for separating the product, and a heater for vaporizing by heating the oily substance separated by the gas-liquid separator, wherein the oily substance separated by the gas-liquid separator is a waste oil; The sludge heat treatment apparatus according to claim 2, wherein a sludge is added. 4. A gas separation section comprising: a condenser for condensing an oily substance of a first gaseous product; an oily substance condensed in the condenser; and a second gaseous substance remaining without being condensed. A gas-liquid separator for separating a product, and a heater for vaporizing the oily substance separated by the gas-liquid separator by heating the oily substance; the oily substance vaporized by the heater is vaporized. The sludge heat treatment apparatus according to claim 2, wherein the waste oil is added. 5. A sludge feeder for supplying dry sludge, a vaporizing section for introducing said dry sludge and performing heat treatment to convert the sludge into a first gaseous product and a first residue. Introducing a gaseous product and the first residue and performing a heat treatment to convert the gaseous product and the second residue into a fourth gaseous product and a second residue, and introducing the fourth gaseous product A sludge heat treatment apparatus comprising: a condensing / separating section for obtaining a produced oil by performing a condensing / separating treatment; and adding vaporized waste oil to the first gaseous product. 6. The sludge heat treatment apparatus according to claim 2, wherein waste oil is added to the dried sludge. 7. The sludge heat treatment apparatus according to claim 2, wherein instead of adding waste oil to the oily substance, waste oil is added to the treatment chamber during heat treatment in the reaction section. 8. The sludge heat treatment according to claim 5, wherein, instead of adding the vaporized waste oil to the first gaseous product, waste oil is added to the treatment chamber during the heat treatment in the reaction section. apparatus. 9. A vaporization section and a reaction section are constituted by a discontinuous processing chamber, a first gaseous product is exhausted to a gas separation section, and a first residue is collected by the vaporization section and the reaction section. 3. The sludge heat treatment according to claim 2, wherein the sludge is discharged to the reaction section via a valve provided therebetween, and backflow of the processing substance from the gas separation section or the reaction section to the vaporization section is suppressed. 4. apparatus. 10. The vaporization section and the reaction section are constituted by a discontinuous processing chamber, a first gaseous product is exhausted to the reaction section, and a first residue is formed between the vaporization section and the reaction section. The sludge heat treatment according to claim 5, wherein the sludge is discharged to the reaction section via a valve provided therebetween, and backflow of the processing substance from the gas separation section or the reaction section to the vaporization section is suppressed. apparatus. 11. The sludge heat treatment apparatus according to claim 1, wherein the waste oil is waste edible oil or waste lubricating oil. 12. A step of introducing dry sludge from a sludge feeder to a vaporization section, a step of converting the dry sludge into a first gaseous product and a first residue by performing a heat treatment in the vaporization section. Introducing the first gaseous product into the gas separation unit, an oily substance, a step of separating into a second gaseous product composed of other substances, a step of vaporizing the oily substance by adding waste oil, A step of introducing the vaporized mixed gas of the oily substance and the waste oil and the first residue into a reaction section, and converting the third residue into a third gaseous product and a second residue by performing a heat treatment; A process for introducing a second gaseous product and the third gaseous product into a condensing / separating section, and performing a condensation / separation process to obtain a product oil. . 13. The oily substance introduced into the reaction section is introduced into a condenser constituting a gas separation section by condensing the first gaseous product to obtain a liquid composed of an oily substance. 13. The method according to claim 12, wherein waste oil is added to the liquid separated in the gas-liquid separator constituting the separation section, and vaporized by heating using a heater constituting the gas separation section. Method for reforming generated oil. 14. A step of introducing dry sludge from a sludge feeder to a vaporization section, a step of converting the dry sludge into a first gaseous product and a first residue by performing heat treatment in the vaporization section. A step of adding vaporized waste oil to the first gaseous product, introducing the first gaseous product and the first residue to a reaction section, and performing a heat treatment to form a fourth gaseous product. A product oil characterized by comprising a step of obtaining a product and a second residue, a step of introducing the fourth gaseous product into a condensation / separation section, and condensing and subjecting the fourth gaseous product to a separation treatment to obtain a product oil. Reforming method. 15. The method according to claim 1, further comprising a step of adding the waste oil to the dried sludge instead of the step of adding the waste oil to any of the oily substance, the liquid composed of the oily substance, and the first gaseous product. A method for reforming product oil according to any one of claims 12 to 14. 16. A step of adding the waste oil to the treatment chamber during the heat treatment in the reaction section instead of the step of adding the waste oil to any of the oily substance, the liquid composed of the oily substance, and the first gaseous product. 15. The method according to claim 12, wherein
The method for reforming a produced oil according to any one of the above. 17. The method according to claim 12, wherein the waste oil is waste edible oil or waste lubricating oil.