KR101390945B1 - coal additive for thermal power plant and its manufacturing method - Google Patents

Abstract

The present invention relates to a coal fuel additive for a coal-fired thermal power plant and a method for producing the coal additive, and more particularly, to a coal additive capable of achieving a high calorific value by supplementing the calorific value of coal by utilizing waste carbides, A main constituent of the present invention for achieving the object of the present invention is to use waste tire carbide as an additive in coal as an additive for coal fuel of a coal-fired power plant, wherein the additive is added in an amount of 1-5 parts by weight based on 100 parts by weight of coal Wherein the waste tire carbide is a carbide produced by pyrolytically decomposing a waste tire in a pyrolytic carbonizer. When the total amount of the carbide component is 100 parts by weight, 80 to 90 parts by weight of the carbon component and 1-4 By weight of sulfur. The method for producing a mixture of coal fuels of a coal-fired power plant according to the present invention comprises the steps of charging a waste tire with a granulator (204) and crushing the waste tire; Passing a magnetic separator 206 to remove metal components contained in the crushed waste tire chip; Charging a waste tire chip through a magnetic separator into a carbonizer (80); And a step of removing the metal component by passing the carbonized carbide discharged from the carbonizer (80) through the magnetic separator (220).

Description

TECHNICAL FIELD The present invention relates to a coal-fired additive for a thermal power plant,

The present invention relates to a coal fuel additive for a coal-fired power plant and a method of manufacturing the coal fuel adder, and more particularly, to a coal fuel additive capable of achieving high calorific value by supplementing low-

[Patent Document 1] Korean Patent Registration No. 10-901561

[Patent Document 2] Korean Unexamined Patent Application Publication No. 10-2001-0018676 entitled "Electric Furnace Carbon Composition Using Waste Generated in a Steel Mill"

TECHNICAL FIELD The present invention relates to a technique for using carbide of a waste tire as an auxiliary raw material for a thermal power plant using pulverized coal

Waste tires are recycled in various forms because they are not desirable because they produce a lot of environmental pollutants when they are born. However, since the recycling rate is too small to fully recycle, there are many difficulties in the treatment of environmental pollutants. Although it is possible to make recycled tires with waste tires, there are limitations because they are legally limited, and there are also difficulties to go through a lot of manufacturing processes in order to recycle waste tires to make new tires

The present invention confirms that the carbon extracted by pyrolysis of the waste tire can be utilized as fuel, and thus the coal fuel additive is manufactured by using the waste tire.

The purpose of the present invention is to utilize the carbide generated in the process of pyrolysis of a waste tire as a fuel additive for a coal-fired thermal power plant

In order to accomplish the object of the present invention, a main constituent of the present invention is to use waste tire carbide as an additive for coal as a coal-fired power fuel, wherein about 1-5 parts by weight of the additive is added based on 100 parts by weight of coal And the waste tire carbide is a carbide produced by thermally decomposing a waste tire in a waste tire pyrolytic carbide. When the entire carbide component is 100 parts by weight, 80 to 90 parts by weight of carbon component and 1 to 4 parts by weight of sulfur And a control unit.

A method of manufacturing an additive for a coal fuel of a coal-fired power plant according to the present invention comprises the steps of charging a waste tire into a granulator (204) and crushing it; Passing a magnetic separator 206 to remove metal components contained in the crushed waste tire chip; Charging a waste tire chip through a magnetic separator into a carbonizer (80); And a step of passing the carbide discharged from the carbonizer (80) after carbonization through a magnetic separator (220) to remove metal components. In addition, the step of passing through an extruder having a temperature of 150 to 300 ° C. A desulfurization process may be added.

The additive according to the present invention can be mixed with coal of a thermal power plant,

In addition, it contributes to fuel saving by reducing the amount of used fuel. In addition, it is possible to utilize the carbide of the waste tire to be used as a coal fuel aid, thereby reducing environmental pollution and reducing waste disposal cost. In addition, in a thermal power plant using low- It is advantageous to increase it. In addition, the amount of ash after combustion is smaller than that of low grade coal, which helps to reduce the load on the dust collector.

In addition, the amount of air pollutants generated from waste tire carbide is extremely small, and the adsorption and deodorization characteristics of the tire tire itself are somewhat specific, so there is an advantage of absorbing a part of toxic gas generated from pulverized coal itself, thereby reducing the generation of air pollutants

Further, according to the present invention, the waste tire carbide has less volatile components and less ash

As a result, the ratio of the fixed carbon is relatively high, the smoke is low, the thermal power is high,

It is advantageous to maintain the temperature at a constant temperature

Further, according to the present invention, the range of recycling waste tires as a coal fuel auxiliary mixture can be further widened, and the oil that is mass-produced during the carbonization treatment of waste tires can be used as another heat source.

Brief Description of the Drawings Fig. 1 is a view showing the whole process of manufacturing a waste tire carbide used as a coal fuel additive in the present invention
2 is a view showing a process in the carbonizer 80
3 and 4 are diagrams showing the composition analysis of the waste tire additive according to the present invention

For reference, coal is divided as follows.

Peat is a kind of peat which is decomposed and deteriorated due to biochemical changes such as fungi in the presence of water. Peat is also known as peat, and peat has undergone decomposition of lignin and cellulose, which are the main components of the plant, such as water, which is buried in the ground and produced by geothermal and acupressure for many years.

The lignite is a kind of bituminous coal, a kind of low-grade lignite with low carbonization. It is technically called brown lignite. The calorific value is 3,000 ~ 4000Kcal / kg, low unleaded carbon. It is used as fuel in some provinces. When a large amount of water is dried, it shrinks and woody aggregate (the woody texture is preserved to some extent so that the grain is visible) is peeled off in the form of a plank, and the carbonitanium (which is dense with fine coal and minerals) And rapidly differentiates (powder).

Brown coal is a type of coal, which is the least carbonized coal in the coal, has a blackish brown color, has a calorific value of 4,000 ~ 6,000 Kcal / kg, and a volatile content of about 40%. Since the carbon content of the lignite is as low as 70%, the shape of the log, the rings, and the stems are often seen. Compared to other coal, the amount of fixed carbon (minus moisture, volatile matter and ash) is low, it is easy to get wet, and it is easy to get dry when dried. It is difficult to use for making coke and it is mostly used as home fuel or other fuel. In Korea, it is mainly distributed in the third basement layer of the Tumen River, Gilju, and Myungcheon Dike.

Bituminous coal is a kind of bituminous coal, black or dark colored, glassy or resin (polished) coal, also called black coal. It gives a long flame when riding, and gives off a stinking odor. The carbon content is 80 to 90% and the hydrogen content is 4 to 6%. As the carbonization degree increases, hydrogen decreases and carbon increases. The calorific value is 8100Kcal / kg or more. Iron coke, and city gas. Recently, research on hydrogen addition and gasification has been developed and is the most important resource of the coal chemical industry. It is named because it has a bitter-like substance when it is dry.

Anthracite (anthracite)

Anthracite (anthracite) refers to coal that burns best without carbonization. The volatile content is 3 ~ 7% and the content of fixed carbon is 85 ~ 95%. Therefore, the flame is short and the smoke is not generated. Since the ignition point is 490 ° C, the fire does not stick well, but the fire is strong and it is burned while maintaining a constant temperature. It is mainly formed in the old strata of Paleozoic era, and sometimes it is anciferous due to the motive power of crustal volcanism or the thermal effect of volcanic rocks even with Cenozoic coal.

First, the results of analyzing the components of the waste tire carbide used in the present invention are as follows.

The results of analysis in Natural Science Industry Co., Ltd., located at 779-4, Gangnam-ri, Garmang-eup, Kwangwon-gun, Gangwon-do (For reference, coal samples from Indonesia imported coal were used as comparative data when analyzing waste tire carbide)

Waste tire carbide

(1) Component analysis result report

Name of sample: Waste tire Carbide powder: T 1 (Sample)

Coal (large): C 1 (Indonesia)

Coal (medium): C 2 (from Indonesia)

1. Moisture content: Experimental conditions: 100 ° C, 2 hours in an air atmosphere

- T 1: 1.68 wt%

- C 1: 8.72 wt%

- C 2: 5.75 wt%

The moisture content of C1 and C2 is considered to be general

2. Ash content: Experimental conditions: 800 degrees Celsius, 2 hours in air atmosphere

- T 1: 4 wt%

- C 1: 2.62 wt%

- C 2: 2.52 wt%

The ash content of C1 and C2 is low

3. Volatile content: Experimental conditions: 600 ° C, 2 hours in nitrogen atmosphere

- T 1: Carbonization loss does not know volatile content

- C 1: 30.06 wt%

- C 2: 30.76 wt%

4. Fixed carbon content: Experimental conditions: 600 degrees Celsius, 2 hours in nitrogen atmosphere

- T 1: 82.69 - 86.90 wt%

- C 1: 60.5 wt%

- C 2: 61.0 wt%

- (2) Analysis of waste tire carbide powder results

- It is expected that ash after carbonization will increase to 7 ~ 8wt% in the process of activation as 4wt%.

- It is possible to switch to a very good activated carbon because the ash content is smaller than that of Chinese coal-based activated carbon.

(3) Waste tire carbide

Item Moisture content (100 degrees Celsius) Fixed carbon (450 degrees Celsius) Ash content (800 degrees Celsius) Waste tire carbide 1.68 82.69 - 86.90 4

As can be seen from the above test results, the waste tire carbide had extremely low water content, ash content, and fixed carbon content was almost as high as anthracite. Therefore, in general, it has higher fixed carbon ratio and less volatile components than low quality coal fuels used in thermal power plants, so it has a high firepower and is less likely to generate smoke during combustion and is advantageous in maintaining a constant flame temperature

The production process of waste tire carbide used as a coal additive in a thermal power plant according to the present invention will be described with reference to the accompanying drawings

1, the treatment of the waste tire 200 is supplied to the hopper 201 and conveyed by the conveying conveyor 202. After the metal material is selected by the magnetic separator 203, 204) and pulverized to a predetermined size of about 20 mm.

Since the granulator 204 is difficult to crush small at a time, the granulator 204 is provided with up to two nails and is crushed gradually. Preferably, 2-3 pieces of the granular elements 204 are connected and broken in succession 2-3 times in succession

Then, it is conveyed by the vertical conveyor 205, the metal material is removed again by the magnetic separator 206, and the separating work is performed by the wind separator 207 according to the weight. Then, if necessary, it is dried through a hot air dryer 209.

The reason for performing the drying operation is to sufficiently dry the object to be carbonized to prevent fusion of the object to be carbonized and to vaporize volatile components in the object to be carbonized to prevent fire and explosion

The hot air supplied to the hot air dryer 209 is supplied to the hot air dryer supply fan 210, and hot air is supplied by heating by the hot air dryer heat exchanger 208. This hot air dryer uses steam as a heat source to facilitate temperature control and reduce energy consumption. The supplied hot air is directly contacted in the dryer and hot air is dried by convection. According to the hot air dryer 209, the drying speed is fast and the fire and explosion can be prevented by the low temperature drying

The dust or the like generated in the hot air dryer 209 is collected by the dust collector 212 and exhausted by the exhaust fan 211. The waste tire chip that has passed through the hot air dryer 209 is stored in the storage tank 213, ) To the carbonizer (80) via the feed hopper (226) and the feed hopper (225) to carbonize the waste tire waste piece

The carbonizer (80) is a device for vaporizing volatile components contained in a raw material by an indirect heating method in a closed-type low-oxygen atmosphere, and the heat source is hot air and is treated by pyrolysis gasification treatment. It is a reduction method that does not generate contaminants due to oxidation, it generates almost no waste, it is possible to produce carbide as a resource, it is possible to recover energy by oil and dry gas, And dioxin-free, non-polluting resources

On the other hand, the general incineration facility is an oxidation treatment method by combustion, and it is an exothermic reaction. It is burned by oxygen supply and is an open type and steam production method by recovering waste heat. These incineration facilities are due to the oxidation method, and as industrial wastes, air pollutants such as dioxins are generated, resulting in low resource conversion rate, additional waste disposal costs, incineration ashes of more than 10%, complex control and high maintenance cost

As shown in FIG. 2, the carbonized furnace structure of the carbonizer 80 is composed of a screw shaft 171 formed in a vertically layered structure and a multi-stage screw conveying structure in which a screw integrally formed therewith is formed. It is possible to prevent clogging troubles and to achieve complete sealing by horizontally feeding sludge by the screw and smooth lower conveyance and to shorten the carbonization time by controlling the screw shaft 171 and the number of revolutions of the screw. The internal temperature of the carbonizer 80 at the carbonization treatment of the waste tire chip is about 510 to 690 degrees centigrade. The configuration of the carbonizer (80) can maximize the heat exchange, shorten the time required for carbonization, reduce the generation of waste, and simplify the equipment maintenance.

In addition, since the carbide carbonized by the carbonization process has a porous nature, it has characteristics close to that of activated carbon having a specific surface area of 1/10 of the activated carbon and a calorific value of 10,000 to 15,000 KJ / kg

It can be used as soil improvement agent, deodorant, adsorbent, humidity control, red tide removing agent, snow melting agent, asphalt aggregate, etc. since it is lightweight, odorless and sterile, granular, air permeable, permeable, water retaining, medium to weak alkaline, It can be used for various purposes. In particular, the present invention utilizes this as a coal fuel additive

The fuel supply for the carbonization treatment is supplied by the oil supply pump 100

At the time of combustion in the carbonizer (80), the odor air of the building is also sent to the combustion air supply fan (215) and burned through the ignition furnace (216) to be removed. The carbonized carbonized material in the carbonizer 80 is removed through the magnetic separator 220 and stored in the carbonized material storage tank 222 through the vertical conveyor 221 and then recycled as a coal fuel additive in the thermal power plant

The carbide of the waste tire was analyzed and the results are shown in FIGS. 3 and 4

FIGS. 3 and 4 show test results of carbide mass produced by the present invention in different organs different from those described above. The carbon content was 82.69-86.90 wt%, and the sulfur content was 3.52-3.63 wt%

The high carbon content means that heat and thermal power are advantageous, but the problem is sulfur content

Therefore, in the present invention, the desulfurization treatment is performed if necessary. In the desulfurization method, a sulfur component is removed by burning at a temperature of 150 to 300 degrees Celsius. As an example of the desulfurization treatment method, the method of Patent Application No. 2007-119424 can be used

The present invention relates to a desulfurization treatment method of a waste rubber by continuous extrusion, comprising a first step of pulverizing a waste rubber to produce a pulverized waste rubber, And two stages of desulfurizing the waste rubber subjected to the one step process at a temperature of 150 to 300 degrees centigrade using only the transfer force. The desulfurization treatment method of the waste rubber uses a continuous extrusion method, consumes a short reaction time in a twin-screw extruder, and does not use an expensive desulfurizing agent at all, and thus has an excellent cost saving effect. For example, in the same manner as described above, the desulfurized carbide contains at least 0.1-0.5 parts by weight of sulfur component

The carbide mass produced by the present invention has extremely few minerals. Therefore, ash generation is small. Therefore, there is no disadvantage that the quality is lower than that of coal when used as a coal fuel additive

The above-mentioned waste tire carbide does not have a problem in use as a coal additive for thermal power generation of the present invention without being subjected to desulfurization, so that it can be used without such a treatment process

When the carbide according to the present invention is used as a coal additive in a thermal power plant, it is preferable to add about 1-5 parts by weight based on 100 parts by weight of pulverized coal

If the above-mentioned input range of about 1-5% by weight is used, the existing facility can be used as a mixture without changing much under various combustion conditions and set conditions in the already set thermal power plant combustion chamber

It is needless to say that, if the amount of the charged waste tire carbide is 5 wt% or more, there is a difference in the combustion temperature change. However, if it is limited to the above range, it can be used as an additive for coal without changing the existing facility at all

The coal fuel additive according to the present invention will be described with reference to the process of using the coal fuel additive in a thermal power plant.

The waste tire carbide is introduced into the coal charger. Then, the discharged coal and the waste tire carbide are crushed together with the pulverized pulverized coal in powder form so as to be fed into the boiler combustion chamber. Then the heat of combustion is used for the thermal power generation through the heat exchanger and the remaining ash is sent to the dust collector

According to the present invention, it is possible to reduce the amount of pulverized coal, increase the thermal power with a high fixed carbon content, and contribute to maintaining a constant temperature of the flame. Therefore, various additional effects can be expected due to the pulverized coal mixture

Particularly, the present invention has an effect of increasing the heat of combustion when applied to a thermal power plant using relatively low grade coal

80 Carbonizer 171 Screw
203, 220 magnetic separator 204 grader

Claims (3)

delete In a coal-fired power plant coal-fuel additive,
The waste tire carbide is used as an additive in coal, and the additive is added in an amount of 1-5 parts by weight based on 100 parts by weight of coal,
The waste tire carbide,
Characterized in that it comprises carbides of 80 to 90 parts by weight and sulfur of 1 to 4 parts by weight based on 100 parts by weight of the entire carbide component, wherein the carbides are generated by pyrolysis treatment of waste tires in a pyrolytic carbonizer. Coal Fuel Additives A method for manufacturing a coal-fired power plant coal-fuel mixture,
Disposing the waste tire into the granulator (204) and crushing it;
Passing a magnetic separator 206 to remove metal components contained in the crushed waste tire chip;
Charging a waste tire chip through a magnetic separator into a carbonizer (80);
Removing a metal component by passing carbide discharged from the carbonizer (80) after carbonization through a magnetic separator (220); The method comprising the steps of:

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