KR100678976B1 - Manufacturing methods of cement fuel made from oil sludge and bio mass, solid fuel therefrom, and apparatus inputting the same - Google Patents

Abstract

A treatment method which improves the difficult operation of oil sludge and improves the heat value of the bio mass by agitating and mixing a bio mass and impregnating the mixed bio mass with oil and water, thereby preparing a solid powder fuel, and prevents secondary environmental pollution by directly using the solid powder fuel as a subsidiary fuel in a cement production process, a solid powder fuel prepared by the method, and an apparatus for injecting the solid powder fuel are provided. A treatment method of oil sludge and bio mass to be used as subsidiary fuels and raw materials during manufacturing of cement comprises the steps of: agitating and mixing 40 to 70 wt.% of oil sludge and 30 to 60 wt.% of bio mass with a length of 50 mm or less to prepare a solid powder fuel; and injecting a fixed quantity of the solid powder fuel into a calcining furnace(9), a preheating chamber(10) or kiln of a cement manufacturing process. An apparatus of injecting a fuel for cement kiln(16) comprises: a burner(15) having a nozzle mounted on the cement kiln to spray a fuel for firing of a cement clinker; an exclusive nozzle mounted on an outer peripheral surface of the burner to inject a solid powder fuel into the burner; and a fixed quantity supplying equipment(13) for supplying the solid powder fuel into the exclusive nozzle.

Description

Manufacture method of cement raw material of oil sludge and biomass, and powdered solid fuel for cement production from the same and its input device TECHNICAL FIELD OF MANUFACTURING

1 is a schematic diagram illustrating a powder solid fuelization process of the present invention.

Figure 2 is a schematic diagram illustrating a procedure of first putting the powder solid fuel of the present invention into the cement preheating chamber.

3 is an enlarged view illustrating a powder solid fuel inlet installed in a preheating chamber and a calcining furnace.

4 is a view schematically showing a cross-sectional structure of a kiln burner for injecting the powder solid fuel prepared in the present invention.

5 is a graph showing the DT-TGA analysis result of the oil sludge used in the present invention.

<Description of Symbols for Main Parts of Drawings>

1: Oil sludge feeder storage

2: hopper and feeder

3: biomass storage

4: hopper and feeder

5: stirring mixer

6: bag filter

7: storage

8: fixed quantity supply device

9: calcining furnace (MFC, RSP, etc.)

10: preheating room

11: mechanical transport device

12: Storage (for kiln)

13: fixed quantity supply device

14: pneumatic transporter

15: burner

16: kiln

17,18: Bag Filter

19,20: Bag Filter Fan

21,22: slot

23: two stage automatic damper

24: dedicated injection nozzle

The present invention relates to a recycling method of waste, and more particularly, to a method of using oil sludge as a cement fuel and a raw material together with biomass, and a fuel for producing cement produced by the same, and an input device for inputting the same. It is about.

In the specification of the present invention, 'oil sludge' refers to wastes comprising the components as shown in Table 1 below when the process of refining petroleum or cleaning the oil storage facility, and 'biomass' refers to rice straw, rice hull, waste It refers to organic wastes that can use energy and absorb moisture such as wood chips and sawdust.

Oil sludge generated when the process of refining conventional petroleum oil or the storage of low oil storage facilities is high in viscosity, difficult to operate, and has a large amount of foreign substances and ash.

Conventional patents related to oil sludge include 'powder fueling method and apparatus for wastewater containing high moisture content (Registration No. 10-0483590)', 'sludge dry solid treatment method (Registration No. 10-0106489)', 'oil sludge Treatment method (Registration No. 10-0020181). The characteristics of these inventions are that all three are heated by applying heat to the oil sludge and used as powder fuel, or after gasification, as fuel, or as liquid fuel with improved fluidity. There is a big difference from the present invention in that the intermediate treatment is performed by applying heat.

The present invention, by stirring / mixing the oil sludge which is usually simply incinerated and the biomass commonly available in the country to impregnate the oil component and water, improve the difficulty of operation when viewed from the oil sludge side, biomass side In this regard, it aims to make powdered solid fuel by improving calories and supplementing mutual deficiencies. In addition, by using this powdered solid fuel as a secondary fuel directly in the cement production process without any additional processing, it is not only useful to use resources, but also a treatment method that can eliminate secondary environmental burdens caused by incineration treatment, such as greenhouse gas generation and incineration ash. It is intended to provide a powder solid raw material and a powder solid fuel input device manufactured thereby.

In order to achieve the above technical problem, the present invention, by stirring and mixing 40 to 70% by weight of oil sludge and 30 to 60% by weight of biomass of 50 mm or less in length and powder solid fuel and calcining the powder solid fuel in the cement manufacturing process Furnace, comprising a step of quantitating the preheating chamber or kiln, provides a process for the treatment of oil sludge and biomass for use as auxiliary fuel and raw materials in the manufacture of cement.

In the method of the present invention, the dosing step is a quantitative input of the powdered solid fuel to the kiln through a burner, or the powdered solid fuel is introduced into the calcination furnace or a double damper for preventing the air inlet installed in the preheating chamber. It is desirable to.

The present invention also includes a burner mounted to a cement kiln and having a nozzle for injection of fuel for firing of a cement clinker; A dedicated nozzle mounted on an outer circumference of the burner and configured to inject powder solid fuel; And a fixed-quantity feeding device for supplying the powdered solid fuel to the dedicated nozzle.

In another aspect, the present invention is the powder solid fuel inlet is installed in the calcination furnace or preheating chamber; A double damper mounted on the powder solid fuel inlet to prevent air from entering; And it is an object of the present invention to provide a powder solid fuel input device for the cement calcination furnace or preheating room, characterized in that it comprises a fixed quantity supply device for supplying the powder solid fuel to the powder solid fuel inlet.

In addition, an object of the present invention is to provide a powder solid fuel for cement production comprising a mixture of 40 to 70% by weight of oil sludge and 30 to 60% by weight of biomass of 50 mm or less in length.

Hereinafter, the present invention will be described in detail by explaining preferred embodiments of the present invention with reference to FIGS. 1 and 2.

First, Figure 1 is a schematic diagram illustrating a powder solid fuelization process of the present invention. Referring to Figure 1, the oil sludge generated during the process of petroleum refining process or cleaning the oil storage facility is removed, while the foreign material is carried through the 50mm * 50mm screen installed on the top of the reservoir (1). Even when importing biomass, 50mm * 50mm screen installed in the upper part of the reservoir (3) removes foreign matter and large particles.

At this time, the straw and waste wood chips of the biomass is preferably crushed to a maximum length of 20mm or less to carry in. The introduced oil sludge and biomass are introduced into the stirring mixer 5 through the respective hoppers and feeders 2 and 4. The mixing ratio is set to 40 to 70% by weight of oil sludge, 30 to 60% by weight of biomass, and it is preferable to allow the liquid oil and water to be sufficiently impregnated into the biomass. It is determined according to the amount of water in the oil sludge, and it is preferable to make the water 25% by weight or less after stirring so that there is no blockage during the process input. For example, when the water content is 25% by weight or more, the powdered solid fuel may stick to the bent portion of the transport pipe in the case of air transport, or may be pressed onto the conveyor belt in the case of a mechanical transport device. The mixing ratio may be appropriately adjusted within the range of the mixing ratio in order to minimize the fluctuation of the calorific value.

Although the stirring time varies depending on the performance of the stirring mixer, the stirring / mixing is sufficiently performed for at least 5 minutes so that the stirring / mixing is uniformly performed. Powdered solid fuel, which has been stirred / mixed, is stored in the reservoir (6). Equipment for deodorization of each line is basically installed.

The powdered solid fuel of the present invention obtained with reference to FIG. 1 may be introduced as auxiliary fuel in a preheating chamber, a calcining furnace or a kiln (firing furnace) in a cement manufacturing facility.

Figure 2 is a schematic diagram illustrating a procedure of first putting the powder solid fuel of the present invention into the cement preheating chamber.

First, the powdered solid fuel stored in the intermediate treatment plant 6 is transferred to the preheating chamber storage 7. In order to quantify the powdered solid fuel, the reservoir 7 is sent to the metering feeder 8, and is introduced into the calcining furnace 9 or the preheating chamber 10 of the preheating chamber through a mechanical transport device 11 such as a conveyor belt. do. There is no restriction on the input ratio with the main fuel that is being used. At this time, the inlet (21, 22) to prevent the inflow of air into the furnace by installing a two-step automatic damper (23) as shown in FIG. The second stage automatic damper is opened and closed while the upper and lower dampers 23 alternately at intervals of 5 to 10 seconds by the power cylinder.

Next, a description will be made of the method of charging the kiln (firing furnace), the powdered solid fuel stored in the intermediate reservoir (7) to the kiln reservoir (7). In the reservoir (7), the powdered solid fuel is sent to the quantitative supply device (13) in order to quantify the kiln auxiliary fuel, and is fed to the kiln (16) by the pneumatic transporter (14) to the kiln burner (15). The input ratio is less than 20% of the existing burner input calories. If the input ratio is higher than that, the burner's flame is increased and lengthened, and the refractory inside the kiln is damaged. The kiln burner is preferably provided with a dedicated injection nozzle in order to use the powdered solid fuel of the present invention. 4 shows an example of an injection nozzle of the present invention, and shows that a dedicated injection nozzle 24 is installed at a predetermined position of a conventional burner, for example, outside the burner. In the present invention, the diameter of the dedicated injection nozzle 24 may be set in consideration of the pneumatic transporter 14 and the amount of powdered solid fuel so that the air pressure inside the nozzle 24 is 20-25 m / sec.

The depot 7 and the quantitative supply apparatuses 8 and 13 are provided with deodorization facilities and explosion-proof plates as a countermeasure for environmental safety, such as odor of oil sludge and the risk of ignition due to volatile matter. In particular, the deodorizing equipment is composed of a system that can significantly reduce the investment cost and maintenance cost because there is no need for activated carbon, special carriers. This deodorization system is a bag filter fan in each calcination furnace 9, preheating chamber 10, kiln 16 to which the powdered solid fuel is introduced, and the suction air sucked for deodorization from the bag filters 17 and 18. Blowing through (19, 20), the secondary air for combustion to process. The dust collected in the bag filters 17 and 18 is returned to the respective reservoirs 7 and 12 for reuse.

On the other hand, cement is manufactured by combining the components such as clay, siliceous, iron, etc., with lime as a main component. The components of the oil sludge used in the present invention are similar to those of the iron raw materials used in the cement manufacturing process as shown in Table 1, and the amount of ash generated is less than 0.1% of the raw material input amount, so that the combustion material generated when used as auxiliary fuel is cement. Even if it is contained in the raw material and recycled, it does not affect the quality. Environmentally complete processing is possible. Oil sludge component in Table 1 is to determine the content of inorganic matter after making the ash state after combustion.

(Unit weight%) division SiO2 Al2O3 CaO Fe2O3 MgO K2O P2O5 LOI Oil sludge 2.0 2.7 1.7 6.2 0.0 0.1 0.9 86.4 Calc 5.4 1.62 50.3 1.08 1.8 0.3 0.2 39.3 Clay 61.0 18.2 0.6 7.7 2.1 3.1 0.1 7.2 Siliceous 95.5 2.0 0.2 1.5 0.1 0.3 - 0.4 Iron 12.1 12.6 32.2 35.9 5.8 0.1 0.1 1.2

The present invention will be described in more detail based on the following examples. However, the following examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.

The oil sludge was produced from S crude oil refinery. The components of the oil sludge, calorific value and combustion characteristics analysis results are shown in Table 2, Table 3 and FIG.

division LOI SiO2 Al2O3 Fe2O3 CaO MgO K2O P2O5 Cl Example 1 84.8 2.1 4.5 5.2 2.4 0.0 0.1 0.9 0.0 Example 2 84.3 2.9 3/5 5.4 2.9 0.0 0.3 0.7 0.0

Sample Name Raw materials 105 ℃ dry powder Remarks Calorific Value (kcal / kg) Example 1 2,298 5,841 29 wt% of moisture Example 2 2,411 5,836

Figure 5 shows the DT-TGA analysis of the oil sludge, and shows the weight loss by moisture and volatile components up to about 450 ℃, above shows the weight loss by the flammables.

As a result of analysis of oil sludge, combustion characteristics were no problem to use as auxiliary fuel in cement manufacturing process, but it was difficult to quantitatively input without intermediate treatment due to problems of high viscosity and high moisture content.

For the improvement, the waste wood chips shredded to 50 mm or less were mixed. Waste wood chip used was 11.5% by weight of moisture and calorific value was 3762 kcal / kg. Stirring mixing mainly used the general rotary mixer which mixes amorphous inorganic material. The mixing ratio was 1: 1 by weight, and 10 ton powdered solid fuel was prepared. As a result of the stirring mixture, the viscous property of the oil sludge was completely lost due to the absorbency of the waste wood chips, thereby making it a powder solid fuel.

The process was carried out in a quantitative injection of 1 ton per hour in S 6 Kiln preheating room for 10 hours to check the process and quality change. As the input, a facility for quantitatively inputting waste tire chips was used.

There was almost no change in the preheating chamber process before and after feeding and no change in the firing state. In order to verify the change of cement product by the use of powdered solid fuel, the physical and chemical stability evaluations were compared and analyzed according to the KS quality test method for setting time, compressive strength and modulus. The results were sufficiently satisfied with the KS standard as shown in Table 4, and the average evaluation result showed no difference between the normal operation and the use of powdered solid fuel.

division Condensation time (hours) Compressive strength (cm ² / kg) First closing 1 day 3 days 7 days standard More than 1 hour 10 hours or less - More than 130 More than 200 During normal operation 2.2 5.3 81 186 278 In case of powder solid fuel 2.3 5.4 80 189 276

As described above, when the oil sludge and various biomass are recycled as auxiliary fuel in the cement manufacturing process, it is possible to recover energy because it is a substitute for fuel instead of incineration. It contributes to the prevention of global warming by reducing the amount of (CO ₂ ).

In particular, when oil sludge and biomass are put into the cement manufacturing process at a temperature higher than 1450 ° C. as described above, the waste is completely harmless, and the combusted material is produced as krinka or cement without the secondary environmental problem. Therefore, it can contribute greatly to "recycling society of resources."

Claims (4)

40 to 70% by weight of oil sludge and 30 to 60% by weight of biomass having a length of 50 mm or less by stirring and powdering solidification and A method for treating oil sludge and biomass for use as auxiliary fuel and raw material in cement production, comprising the step of quantitatively introducing the powdered solid fuel into a preheating chamber or a kiln as calcination of a cement manufacturing process. A burner mounted to the cement kiln and having a nozzle for injection of fuel for firing the cement clinker; A dedicated nozzle mounted on an outer circumference of the burner and configured to inject powder solid fuel; And A fuel injection device for cement kiln, characterized in that it comprises a fixed quantity supply device for supplying the powdered solid fuel to the dedicated nozzle. Powder solid fuel inlet installed in the calcination furnace or preheating chamber; A double damper mounted on the powder solid fuel inlet to prevent air from entering; And Powdered solid fuel injector for cement calcination furnace or preheating room, characterized in that it comprises a fixed-quantity supply device for supplying powdered solid fuel to the powdered solid fuel inlet. Powder solid fuel for cement production comprising a mixture of 40 to 70% by weight of oil sludge and 30 to 60% by weight of biomass of 50 mm or less in length.

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