KR20090001381A - Processing method of organic waste - Google Patents

Abstract

An organic waste-treating method is provided to treat organic waste at low cost and manufacture various treated materials by consistently preheating organic waste with vapor using waste heat, and promptly carrying out stirring, reaction and stabilization of the organic waste. An organic waste-treating method comprises: an incineration step(S1) of incinerating various foreign materials to generate waste heat, thereby generating vapor; a first dehydration step(S2) of dehydrating the organic waste to a water content range of 60 to 70%; a vapor feeding starting step(S3) of preheating the organic waste by vapor; a crushing step(S4) of selecting iron and metal of the organic waste, and crushing the iron and metal; a second dehydration step(S5) of dehydrating the crushed organic waste to a water content range of 50 to 60%; a first stirring step(S6) of primarily heating and stirring the dehydrated organic waste for 20 to 30 minutes to stabilize the organic waste; a second stirring step(S7) of mixing the resulting material with quicklime using waste oyster shell, and calcium hydroxide or magnesium oxide in the amount of 5 to 30% by weight of the total weight, and secondly heating and stirring the mixture for 20 to 25 minutes to stabilize the mixture; a first drying step(S8) of primarily drying the resulting material to a water content of 40 to 45% by saturated vapor exhausted from a stirring reactor; a second drying step(S9) of drying the first dried material to a water content of 30 to 35%; an impurity screening step(S10) of screening impurities contained in the second dried material; and a packing step(S11) of preparing the treated material in a granular or power shape and packing the treated material.

Description

Processing method of organic waste

1 is a process chart showing a step-by-step process sequence of the organic waste treatment method of the present invention.

Explanation of symbols on the main parts of the drawings

S1; Incineration step S2; Primary dewatering stage

S3; Steam supply start step S4; Shredding

S5; Secondary dehydration step S6; 1st Stirring Step

S7; Second stirring step S8; 1st drying stage

S9; Secondary drying step S10; Impurity Selection Step

S11; Packing stage

The present invention relates to an organic waste treatment method, and more particularly, to an organic waste treatment method capable of manufacturing various treatments such as fertilizer, soil improver, artificial soil, solid fuel, feed and the like by using organic waste.

Conventionally, organic wastes have been used only by simple treatment in waste landfills or incinerators, by anaerobic or aerobic feed, or by composting with just sawdust or fermentation.

Feeding of organic wastes has been done by simply crushing food wastes as raw materials and warming them at a temperature of 100 ℃ for 30 minutes and then drying them in liquid form or simply by crushing the wastes. Has increased the cost of treating organic waste.

The composting of organic wastes was digested by anaerobic treatment or aerobic treatment, but methane gas was not only acidified of soil but also in acidification of fermentation and fermentation by simply indiscriminate use of sawdust, rice hull or fermentation enzyme without treatment of heavy metals, salt and leachate. Many odors such as hydrogen sulfide and hydrogen sulfide gas are generated. In particular, the salts, wastewater and wastes are regenerated.

On the other hand, the waste oyster shells that are being produced have been continuously increased due to the development of the oyster farming business than decades ago. As a result, the amount of waste oyster shell has increased enormously. .

An object of the present invention for solving the above problems, by burning various kinds of foreign matter mixed in the methane gas, waste wood, industrial waste, food waste generated in the incinerator, etc. to continuously preheat organic waste with steam using waste heat, As it can be used as direct or indirect heat of the stirred reactor, when organic waste is preheated and stirred in the stirred reactor, it is rapidly heated to stir, react and stabilize the organic waste, and uses waste heat and waste oyster shell. Organic wastes can be treated at low cost, and various treatments such as artificial soils, land improvers, lime fertilizers, high-fertilizer fertilizers, special fertilizers, livestock feed, liquefied fertilizers, solid fuels, etc. To provide a method for treating organic waste, which can be manufactured.

The organic waste treatment method of the present invention for achieving the above object is an incineration step of burning waste wood or various foreign matters mixed into industrial waste or food waste to generate waste heat and steam thereby; Organic waste is introduced into the input hopper, and the screw conveyor inside the input hopper is rotated forward and backward, and the primary dehydration step of dehydrating the primary water to 60 to 70%; A steam supply start step of supplying steam by the waste heat to a screw conveyor inside the input hopper so that the organic waste is preheated by the steam; A crushing step of compressing and transporting the organic waste to the outside of the input hopper while continuously preheating the steam, and then introducing the crusher into the crusher, and crushing the iron and metal after the organic waste is preheated to the steam; A secondary dehydration step in which the crushed organic waste is continuously preheated by high temperature steam and transferred to an extruder dehydrator for secondary dehydration to maintain water at 50 to 60%; The secondary dehydrated organic waste is transferred to a preheated stirred reactor, preheated and continuously preheated with hot steam, and stabilized by primary warm stirring for 20-30 minutes while further heating is applied to the preheater in the stirred reactor. A tea stirring step; In the stirring reactor in which the first stabilized and stabilized processed material is stored, quicklime (CaO), calcined lime (CaCO3) or magnesium oxide (MgO) using waste oyster shells are mixed at 5 to 30% by weight of the whole and mixed for 20 to 25 minutes. A secondary stirring step of stabilizing by secondary warming and stirring; After the second warming and stirring, the pressure is lowered as the steam in the stirring reactor is discharged, and the first drying step is carried out so that the saturated steam in the stirring reactor is discharged as the dry wind is introduced therein, so that the moisture is 40 to 45%. Wow; A second drying step in which the first dried material is transferred to a drier, and secondly dried so that moisture is 30 to 35%; An impurity sorting step of transferring the second dried material to a sorter to sort impurities contained in the processed material; It characterized in that it comprises a step of manufacturing the package is processed in the form of granular or powdery, the impurities are selected.

Another characteristic of the organic waste treatment method of the present invention is that the final treated material in the granular or powdery phase is artificial clay, land improver, lime-treated fertilizer or magnesium oxide (CaO), calcined lime (CaCO3) by addition of It is characterized in that it is a high soil fertilizer by adding MgO).

Another feature of the organic waste treatment method of the present invention is that the steam by the waste heat is continuously supplied in the whole step of treating the organic waste to maintain the preheated state when the organic waste is introduced into the stirred reactor. It features.

Another feature of the organic waste treatment method of the present invention, the waste water discharged in the first and second dehydration step is stored in a collecting tank, saturated steam discharged from the hot stirrer is put into the collecting tank and the waste water At the same time as the sterilization is liquefied through the cooling condensation and mixed with the waste water, and nitrogen (N), phosphoric acid (P), galley (K) and the like is added to fermentation, aged further comprising the step of producing a liquefied fertilizer It is characterized by.

Another feature of the organic waste treatment method of the present invention, bark, rice hull, zeolite, bentonite, fermentation agent, together with quicklime (CaO), hydrated lime (CaCO3) or magnesium oxide (MgO) using the waste oyster shell in the stirred reactor Silica and nitrogen, phosphoric acid, girly, blood of the slaughterhouse is further added, characterized in that a special fertilizer containing the above components is produced.

Another feature of the organic waste treatment method of the present invention, the chaff or sawdust and the combustion agent is further added to the stirring reactor, the reaction is stirred, and then the stabilized treatment is compression molded into a shape and size that is easy to burn is produced as a solid fuel It is characterized by.

Another characteristic of the organic waste treatment method of the present invention is that the bovine buckwheat, gingko, soybean meal, skim steel, vitamins, minerals, microbial enzymes, flavors are added to the stirred reactor, and the animal feed is prepared by stirring and drying. It features.

Specific features and advantages of the organic waste treatment method according to the present invention will become more apparent from the following description with reference to the accompanying drawings.

1 is a process chart showing a sequential step of the organic waste treatment method of the present invention, as shown in the present invention, the incineration step (S1), the first dehydration step (S2), steam supply start step (S3), crushing step (S4) ), The second dehydration step (S5), the first stirring step (S6), the second stirring step (S7), the first drying step (S8), the second drying step (S9), the impurity selection step (S10), packaging Organic waste is processed through the step (S11) sequentially.

Incineration step (S1), incineration of various foreign substances mixed in the methane gas, waste wood, industrial waste, food waste generated in the incinerator incinerator, and generates the steam by the waste heat generated during incineration, the steam will be described later It is supplied continuously in stages.

In this way, after generating steam, organic waste, that is, food waste, phosphate, livestock, concentrated and fishery waste, and sewage sludge is introduced into an input hopper, and although not shown, the organic waste is discharged to the input hopper. A plurality of holes are formed and a plurality of screw conveyors are installed therein, and although not shown, the screw conveyors are formed with a plurality of holes so as to supply steam generated by the waste heat.

Subsequently, in the first dehydration step (S2), the organic waste introduced into the input hopper is dehydrated as the screw conveyor inside the input hopper is rotated forward and backward, so that the water content is firstly dehydrated such that the moisture content is 60 to 70%. In other words, the waste water is stored in a collecting tank.

At the same time, the supply of steam by the waste heat to the screw conveyor is started, the steam is supplied through a plurality of holes formed in the screw conveyor through the steam supply start step (S3) to apply heat to the organic waste, accordingly Organic wastes are preheated.

Subsequently, in the shredding step (S4), the organic waste preheated to some extent is preheated to the steam while being continuously preheated to the steam, and is fed into the shredding injector, and the organic waste is preheated continuously to the shredding injector. Iron and metal are sorted by electromagnets or permanent magnets in the inside, and the selected organic waste is crushed to less than 10 mm.

Subsequently, in the second dehydration step (S5), the crushed organic waste is continuously heated to about 70 ° C. with high temperature steam and then transferred to an extruder dehydrator so that the dehydrated organic waste is dehydrated to maintain 50 to 60% of moisture. The liquid, ie waste water, is stored in a collecting tank.

Subsequently, in the first stirring step (S6), the secondary dehydrated organic waste is transferred to a preheated stirred reactor, preheated and continuously preheated with a high temperature steam, and maintained at 80 ° C while further applying heat to the preheating device in the stirred reactor. The organic waste is stabilized by primary warming and stirring for 20 to 30 minutes in a state.

Subsequently, in the second stirring step (S7), calcined lime (CaO), calcined lime (CaCO3) or magnesium oxide (MgO) using waste oyster shells as necessary in the stirred reactor in which the first warmed and stabilized treated product is stored, 5 ~. 30% by weight of the mixture is stabilized by a second warm stirring for 20-25 minutes.

Here, in the first stirring step, when the preheated and stabilized processed material is added with quicklime (CaO), calcined lime (CaCO3), or magnesium oxide (MgO) using waste oyster shells, the treated substances react with the treated materials. The water and the inside of the stirred reactor are warmed to a higher temperature and further warmed by the preheater so that the temperature inside the stirred reactor is raised to around 100 ° C.

As such, when the temperature inside the stirred reactor is maintained at 100 ° C., the agitated material is completely extinguished and stabilized.

And when the quicklime (CaO), slaked lime (CaCO3) or magnesium oxide (MgO) using the waste oyster shell reacts with the first stabilized treatment, the salt contained in the treatment can be treated to a safe level. It is also proved by the chemical formula and typically, when the reaction of quicklime (CaO)

It can be seen that the salt is partially dissipated to minimize the content.

Subsequently, in the first drying step (S8), when the pressure inside the stirring reactor rises and the pressure reaches a level of about 1 Kg / cm 2, the automatic safety valve of the stirring reactor is opened and the steam inside is discharged through the discharge pipe connected to the stirring reactor. The steam is fed into a collecting tank where wastewater is stored.

At the same time, dry air is introduced into the stirring reactor by hot air, and thus, saturated steam in the stirring reactor is discharged, and the first drying is performed so that the water becomes 40 to 45%.

Subsequently, in the second drying step (S9), the first dried material is transferred to a drier, and secondly dried so that moisture is 30 to 35%.

Subsequently, in the impurity selection step (S10), the second dried material is transferred to a sorter, and the impurities contained in the processed material are sorted.

Finally, in the packaging step (S11), the treated material, which is selected for impurities, is granulated or powdered and then packaged, and the final treated product is artificial clay, land improver, lime by addition of quicklime, calcareous lime (CaCO3). It is a fertilizer for processing, or a fertilizer for processing soil by the addition of magnesium oxide (MgO).

In addition, while saturated steam discharged from the high temperature stirrer is introduced into the collecting tank in which the wastewater discharged in the first dehydration step (S2) and the second dehydration step (S5) is stored, the steam sterilizes the wastewater and simultaneously forms a cooling condenser. It is liquefied through and mixed with the wastewater, it can be fermented, aged by adding nitrogen (N), phosphoric acid (P), girly (K) and the like to produce a liquefied fertilizer.

On the other hand, if necessary in the above-described secondary stirring step (S7) and mixed with the various components in the stirring reactor with the quicklime (CaO), calcined lime (CaCO3) or magnesium oxide (MgO) using the waste oyster shell as needed Various treatments, that is, fertilizers, animal feed, and solid fuels to which the various components are added may be prepared.

In the manufacture of fertilizers with various components added, bark, rice hulls, geolites, with quicklime (CaO), hydrated lime (CaCO3) or magnesium oxide (MgO) using waste oyster shell in the second stirring step (S7) Bentonite, fermentation agent, silicic acid and nitrogen (N), phosphoric acid (P), girly (K), the blood of the slaughterhouse, etc. may be further added to produce a custom fertilizer to which the respective components are added.

In the preparation of the feed for cattle, in the second stirring step (S7) in the agitated reactor in the reactor with lime hydrated lime (CaO), hydrated lime (CaCO3) or magnesium oxide (MgO) together with the wheat vein, gangan, soybean meal, It is possible to prepare animal feed for which E. coli and Salmonella are completely killed by further adding skim steel, vitamins, minerals, microbial enzymes and flavors, and stirring and drying.

In the preparation of the solid fuel, in the second stirring step (S7), the chaff or sawdust and the combustion agent together with the quicklime (CaO), calcined lime (CaCO3) or magnesium oxide (MgO) using waste oyster shell in the stirred reactor further After stirring by stirring, the stabilized product may be compression molded into a shape and size that is easy to burn to prepare a solid fuel.

Organic waste treatment method according to the present invention as described above has a variety of effects, first, by burning various foreign substances mixed in the methane gas, waste wood, industrial waste, food waste generated in the incinerator, etc. to the steam using waste heat The organic waste can be preheated continuously and used as direct or indirect heat in the stirring reactor. Therefore, when the organic waste is preheated and stirred in the stirring reactor, the organic waste is rapidly heated so that the process of stirring, reaction and stabilization of organic waste can be performed quickly. do.

Second, since organic waste can be treated using waste heat and waste oyster shell, organic waste can be treated at low cost.

Third, almost all kinds of wastes, such as waste wood, industrial waste, and organic waste such as food waste, sewage sludge, phosphorus, livestock, and concentrated fishery waste, can be recycled, thereby improving the environment polluted by wastes.

Fourth, since the wastewater generated in the process of treating organic waste can be sterilized and sterilized by the saturated steam generated in the stirring reactor, even the wastewater can be manufactured as a liquefied fertilizer. Is processed.

Fifth, stabilizing organic waste can be processed into artificial soil, land improver, lime treatment fertilizer, high soil fertilizer fertilizer, livestock feed, solid fuel, liquid fertilizer. It becomes possible.

Claims (7)

An incineration step in which waste heat and steam are generated by incineration of various foreign matters mixed into methane gas, waste wood, or industrial waste or food waste generated in an incineration plant; Organic waste is introduced into the input hopper, and the screw conveyor inside the input hopper is rotated forward and backward, and the primary dehydration step of dehydrating the primary water to 60 to 70%; A steam supply start step of supplying steam by the waste heat to a screw conveyor inside the input hopper so that the organic waste is preheated by the steam; A crushing step of compressing and transporting the organic waste to the outside of the input hopper while continuously preheating the steam, and then introducing the crusher into the crusher, and crushing the iron and metal after the organic waste is preheated to the steam; A secondary dehydration step in which the crushed organic waste is continuously preheated by high temperature steam and transferred to an extruder dehydrator for secondary dehydration to maintain water at 50 to 60%; The secondary dehydrated organic waste is transferred to a preheated stirred reactor, preheated and continuously preheated with hot steam, and stabilized by primary warm stirring for 20-30 minutes while further heating is applied to the preheater in the stirred reactor. A tea stirring step; In the stirring reactor in which the first stabilized and stabilized processed material is stored, quicklime (CaO), calcined lime (CaCO3) or magnesium oxide (MgO) using waste oyster shells are mixed at 5 to 30% by weight of the whole and mixed for 20 to 25 minutes. A secondary stirring step of stabilizing by secondary warming and stirring; After the second warming and stirring, the pressure is lowered as the steam in the stirring reactor is discharged, and the first drying step is carried out so that the saturated steam in the stirring reactor is discharged as the dry wind is introduced therein, so that the moisture is 40 to 45%. Wow; A second drying step in which the first dried material is transferred to a drier, and secondly dried so that moisture is 30 to 35%; An impurity sorting step of transferring the second dried material to a sorter to sort impurities contained in the processed material; The organic waste treatment method comprising the step of producing a package in the form of granular or powdery, the impurities are selected. The method of claim 1, The final treated product in the granular or powdery phase is artificial clay, land improver, lime-treated fertilizer by the addition of quicklime (CaO), slaked lime (CaCO3), or high-fertilizer fertilizer by the addition of magnesium oxide (MgO). Organic waste treatment method characterized in that. The method according to claim 1 or 2, The organic waste treatment method, characterized in that the steam by the waste heat is continuously supplied in the entire step of treating the organic waste to maintain the preheated state when the organic waste is introduced into the stirring reactor. The method of claim 1, The wastewater discharged in the first and second dehydration stages is stored in a collecting tank, and saturated steam discharged from the high temperature stirrer is introduced into the collecting tank to sterilize the wastewater and liquefy through a cooling condenser. Mixed with, and the organic waste treatment method further comprises the step of fermentation, aging is added to the nitrogen (N), phosphoric acid (P), girly (K) and the like to prepare a liquefied fertilizer. The method of claim 1, The bark, chaff, zeolite, bentonite, fermenter, silicic acid and nitrogen, phosphoric acid, girly, slaughterhouse together with quicklime (CaO), hydrated lime (CaCO3) or magnesium oxide (MgO) using the waste oyster shell in the stirred reactor. The method of organic waste treatment, characterized in that further added to produce a special fertilizer containing the above components. The method of claim 1, The chaff or sawdust and the combustion agent is further added to the stirring reactor, the reaction is stirred, and then the stabilized treatment is compression molded into a shape and size that is easy to burn, and the organic waste treatment method characterized in that it is produced as a solid fuel. The method of claim 1, Organic waste treatment method characterized in that the animal feed is prepared by stirring, drying is further added in the stirred reactor, wheat bran, soybean meal, skim steel, vitamins, minerals, microbial enzymes, flavors.

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