JPH11218322A - Treating device for smoke and ash in flue - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effect a removing work of smoke and ash easily and quickly by a method wherein a treating device for smoke and ash in a flue is constituted of a scraper, arranged slidably in a horizontal zone, a tension wire, connected to both surfaces of the scraper and extended into the lengthwise direction of the horizontal zone, and a motor-driven winch, winding and winding off the tension wire. SOLUTION: A horizontal zone 1 is provided with the same section across the whole length of the same while a scraper 10 is provided with a scraping member having a lower side rim 11 coinciding with the profile of the bottom part 1a of the section of the horizontal zone 1 so as to be optimum for the scraping of smoke and ash. A tension wire 12 is connected to a surface of the scraper 10, which is faced to the end part A of the horizontal zone 1, while another tension wire 13 is connected to the other surface of the scraper 10, which is faced to the other end part B of the horizontal zone 1. A motor-driven winch 14a, winding and winding off the tension wire 13, and another motor-driven winch 15a, winding and winding off the tension wire 13, are installed at proper positions outside of the horizontal zone 1. According to this method, the smoke and ash can be treated easily and quickly whereby workability can be improved while contributing to the saving of a cost and working persons can be prevented from causing a disaster.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flue gas for exhaust gas installed in a smelting plant, and more particularly to a method for treating smoke ash for removing smoke ash deposited on a horizontal area thereof, and is suitably used for carrying out the method. Related to the device.

[0002]

2. Description of the Related Art A smelter is equipped with a roasting furnace, a smelting furnace, a self-melting furnace, etc., which blows high-temperature air to perform smelting, so that a large amount of exhaust gas is discharged. It contains fumes and gases, which are ultra-fine particles with condensed vaporized components, such as dust and its oxidation products, and is a fume containing harmful components. Due to environmental regulations, it collects dust, sulfur dioxide, and sensible heat of gas. Therefore, the exhaust gas sequentially passes through a flue gas through a gas cleaning device, a purification unit such as a mist separator, or a heat recovery facility, and is then discharged as clean gas to the outside air. These purification units are mainly configured as horizontal passages (horizontal areas),
Since the fumes may be deposited gradually over time in such horizontal areas even with clean gases, the deposited fumes may be removed at appropriate intervals, even for clean gases.

[0003] Conventionally, smoke ash deposited in a horizontal area of a flue has a manhole cover provided at an appropriate position such as an end of the horizontal area removed during regular maintenance, and an operator enters the flue and removes scraping equipment. The smoke ash was manually collected to remove the smoke ash and was discharged to the outside through a dust hole provided at an appropriate position, thereby eliminating the following problems.

[0004]

The removal of such deposited smoke ash affects the recovery of dust and harmful substances when the amount of deposition increases, so regular repairs do not adversely affect the recovery of dust by the purification unit. At regular intervals, for example, when the horizontal area of the flue was 20 m, the removal of smoke ash was usually performed twice a month. This removal of smoke ash took a relatively long time due to human power, which was not favorable in terms of work efficiency and economics.Because the work was performed in a narrow place, there was a danger of worker accidents, and this was favorable in terms of health management. There were problems such as no.

An object of the present invention is to eliminate the above-mentioned problems, so that the operation for removing smoke ash can be carried out easily and quickly, the cost can be reduced, and the risk of deteriorating health can be reduced. It is an object of the present invention to provide a method for treating smoke ash in a flue of a smelter which is not susceptible. Another object of the present invention is to provide an apparatus which can be suitably used for carrying out the above-described method for treating smoke ash according to the present invention.

[0006]

In order to achieve the object of the present invention, a smoke ash treatment apparatus according to the present invention has a scraping member having a lower edge corresponding to a bottom cross-sectional profile of the horizontal section, and Including a scraper slidably disposed in a horizontal section, a cable connected to both sides of the scraper and extending in a longitudinal direction of the horizontal section, and an electric winch for winding and unwinding each of the cables. It is characterized by. Preferably, the scraper is provided with a pair of sliders and a tilting mechanism for tilting the scraping member in order to smoothly return the scraper. The tilting mechanism is preferably 3
A three-link and a part of the scraping member constitute a quadrangular link mechanism, and the pair of links are linear so that the scraping member maintains a vertical state. Has become. Also preferably, said lower edge of the scraping member is formed by a pipe mounted along its lower part.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. 1 and 2 schematically show a horizontal section 1 of a flue in which a smoke ash treatment operation is being performed according to the method of the present invention. From 2, it passes through the horizontal section 1 to the ascending path 3 at the other end. In this smoke ash treatment method, a scraper 10 driven by power is used, and the smoke ash is scraped off by sliding of the scraper. The horizontal section 1 has the same cross section over its entire length, and the scraper 10 has a lower edge 11 which matches the contour of the bottom 1a of the cross section of the horizontal section 1 so that the smoke ash can be suitably scraped off. It has a scraping member. In addition, horizontal area 1
For example, a dust chamber 4 is provided below the end of the ascending path 3.

[0008] The treatment of smoke ash is usually carried out during regular maintenance, in which case the scraper 10 is reciprocated between one end A and the other end B of the horizontal section 1, and from the end A to the end B in the illustrated example. In the moving stroke, the lower edge 11 of the scraping member of the scraper 10 is slid in contact with the bottom surface 1a of the flue, and the ash is scraped to the end B side and collected, and the damper 4a is urged to generate dust. It falls into the chamber 4. In the return stroke from the end B to the end A, the lower edge 11 of the scraping member of the scraper 10 moves away from the bottom 1a of the flue.

The scraping process and the returning process are repeated an appropriate number of times, and in each cycle, the smoke in the horizontal section 1 is dropped into the dust chamber 4, and the damper 4a is opened and discharged from the dust chamber 4. A suitable sensor, preferably a limit switch, is provided near each end of the horizontal section 1 so that when the sensor detects the scraper 10, the scraper is turned back through the controller. Needless to say, during normal operation, the dust chamber 4 is closed with a lid flush with the bottom 1a.

The reciprocating movement of the scraper 10 can be performed by a suitable method such as a chain mechanism or a screw mechanism. Preferably, as shown in FIGS. Winding by winch on each side
This is done by unwinding. In addition, when performing with an electric winch in this way, both sides of the scraper 10,
That is, the cable 12 is connected to the surface facing the end A of the horizontal section 1 and the cable 13 is connected to the surface facing the end B.
An electric winch 14 for winding and unwinding 12 and an electric winch 15 for winding and unwinding the cord 13 are installed at appropriate positions outside the horizontal section 1. Pulleys 14a, 15a are provided to guide the cords of each winch. Thus, the use of the cord and the electric winch has the advantage that the lower edge 11 of the scraper scraping member can be separated from the bottom 1a of the flue by a very simple mechanism in the return stroke, as described below. is there.

The cross section of the bottom or bottom of the horizontal section 1 of the flue is preferably arcuate, as shown, but may have other shapes, for example an inverted trapezoidal shape.
A rope or a wire made of a suitable material having heat resistance is used as the cords 12 and 13. As shown schematically in FIG. 2, each end of the horizontal section 1 of the flue is closed by a manhole cover 5 or 6, and when removing smoke ash, the covers are removed and the scraper 10 is placed on both sides. Electric winch 14,
Set to travel by 15. When the scraper 10 is not used, it is preferable that any of the end portions A
Or, it is stored in a suitable storage space provided near B.

Next, an embodiment of the smoke ash treatment apparatus according to the present invention will be described. The device basically comprises a scraper 10 slidably arranged in a horizontal section 1 as shown in FIGS. 3 and 4, connected to both sides of the scraper and parallel to or in the longitudinal direction of the horizontal section 1. The cable is composed of cords 12 and 13 extending substantially in parallel and electric winches 14 and 15 (not shown) for winding and unwinding the cords. This scraper 10 has a lower edge
11 has a scraping member 10a that matches the profile of the cross section of the bottom 1a of the flue. The scraping member 10a is preferably formed in a plate shape or a pipe shape from the viewpoint of weight reduction.

The horizontal section 1 of the flue is preferably designed as a passage of circular cross section, with the advantage that the horizontal section 1 can be designed as a circular tube, for example made of steel. In one example, the horizontal section 1 is a circular pipe having an inner diameter of 1 m. If the horizontal section 1 is formed of a circular tube in this way, the lower edge 11 of the scraping member 10a of the scraper 10 is formed in an arc shape in accordance with the arc of the bottom 1a.

As described above, when the scraper 10 moves from one end A of the horizontal section 1 to the other end B where the dust chamber 4 is located, the lower edge 11 of the scraper 10 moves to the bottom 1a of the horizontal section 1.
To scrape off the smoke, and conversely, from end B to end A
When returning to the above, the lower side edge 11 moves without contacting the bottom 1a. When the smoke from the bottom 1a, which is the passage, is scraped off by the scraper 10, the smoke around the bottom 1a is removed.
To be removed at the next scraping.

In order to prevent the lower edge 11 of the scraper 10 from touching the bottom 1a of the flue during the return stroke of the scraper 10, one side of the scraper 10, as shown more clearly in FIG. In FIG. 6, a pair of sliders 16 and 16 are juxtaposed near the lower edge 11 on the side facing the end portion A, and as shown in FIG.
11 moves away from the bottom 1a of the flue, instead the pair of sliders contact the bottom 1a. These sliders preferably consist of identically shaped pieces as shown and are made of a material which does not damage the bottom 1a of the flue.

The inclination of the scraper 10 and the resulting contact between the sliders 16 and 16 and the bottom 1a can be carried out by a suitable control system using the detection signal from the folding sensor, if desired. Is a cable 1
It is performed by a link mechanism as a tilting mechanism which is switched by the tension operation of 2 and 13. As shown in FIGS. 5 and 6, the link mechanism includes three links 17, 18, and 19, and the three links and a part 20 of the scraping member 10a are configured as a rectangular link mechanism. The vertices, or connections, of these links are connected or articulated by pin joints and are mutually drivable. In FIG. 4, reference numeral 21 denotes a connecting portion between the link 17 and the part 20, and reference numeral 22 denotes a link 19 and the part 20.
It is a connection part with.

The electric winches 14 and 15 are controlled by a controller so that the tension of the cable 13 is larger than the tension of the cable 12 in the scraping process in which the lower edge 11 of the scraping member 10a is slid. Are controlled so that they are opposite to each other, and in each case, tension is applied to each cord. The cable 12 is a shackle 23, a thimble 24 and a clip 25.
Is attached to the upper part of the scraper 10, and the cord 13 is attached to the intermediate position of the scraper 10 by the shackle 23, the thimble 24, and the clip 25 via the link mechanism.

The tilting mechanism of the scraper 10 is such
Operated using the tension relationship of 12, 13. That is, in the scraping process, the cable 13 receives a stronger tension than the cable 12,
As shown in FIG. 5, the lower edge 11 of the link mechanism slides on the bottom 1a of the horizontal section 1 because the pair of links 18 and 19 is in a straight line, whereby the scraper 10 is in a vertical state. Move while scraping off. In the return stroke, the tension of the cord 12 becomes larger than the tension of the cord 13, so that the scraper 10 is inclined as shown in FIG. 6, and the pair of sliders 16 and 16 comes into contact with the bottom 1a of the horizontal section 1; The lower edge 11 of the scraping member moves away from the bottom 1a.

The lower edge 11 of the scraping member is made of a material which does not damage the bottom 1a of the horizontal section 1, preferably the lower edge is mounted along the lower part of the scraping member 10a as shown in FIG. Pipe 26, preferably a metal pipe. With such a pipe, there is an advantage that the sliding of the lower edge 11 is smooth and the bottom 1a of the horizontal section 1 is not damaged.

[0020]

As described above, according to the method for treating ash according to the present invention, the ash deposited on the horizontal area of the flue of the smelter is raked up without manpower by sliding the scraper with power. Since it can be discharged through the dust chamber, it can be processed easily and quickly, improving workability, contributing to cost reduction, and without causing a worker's disaster.

If the operation of the scraper in the flue is performed by a pair of electric winches via a cable, the removal of smoke ash can be performed with a relatively simple mechanism and at a relatively low cost. Further, according to the smoke ash treatment apparatus of the present invention, the above-described treatment method can be performed by a simple mechanism using a scraper reciprocated in a horizontal area of the flue, a cable, and a pair of electric winches.

By providing the scraper with a pair of sliders and a tilting mechanism for the sliders, the return stroke of the scraper, and hence the reciprocating operation thereof, is facilitated, and the scraping of smoke ash is facilitated. By configuring the tilting mechanism as a rectangular link mechanism with three links and a part of the scraping member, it is possible to control the positions of the scraper's scraping stroke and the return stroke with a very simple configuration by the tension relationship of the cords. .

Further, the lower edge of the scraper is formed by a pipe, so that the scraper can slide smoothly without damaging the bottom of the horizontal area of the flue.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a horizontal area of a flue illustrating an embodiment of a method for treating smoke ash according to the present invention.

FIG. 2 is a schematic longitudinal sectional view of the horizontal section.

FIG. 3 is a side view schematically showing a smoke ash treatment apparatus according to the present invention.

4 is an end view of a portion of the device shown in FIG.

FIG. 5 is a side view showing a main part of the smoke ash treatment device according to the present invention.

FIG. 6 is a side view showing a state different from FIG. 5 of a main part of the device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Horizontal area 1a Bottom of horizontal area 4 Dust chamber 10 Scraper 10a Scraping member 11 Lower edge of scraping member 12, 13 Cable rope 14, 15 Electric winch 16 Slider 17, 18, 19 Link 20 Part of scraping member 26 pipes

Claims (4)

[Claims] 1. An apparatus for removing ash deposited in a horizontal area of a flue, comprising a scraping member having a lower edge corresponding to a bottom cross-sectional profile of the horizontal area and sliding in the horizontal area. A smoker movably disposed; a string connected to both sides of the scraper and extending in a longitudinal direction of the horizontal section; and an electric winch for winding and unwinding each of the strings. Smoke ash treatment equipment in Hokkaido. 2. The scraper is provided with a pair of sliders, and the lower edge of the scraping member is in contact with the flue by operating the cable, or the lower edge is separated from the flue and the slider is moved by smoke. The smoke ash treatment apparatus according to claim 1, further comprising a tilting mechanism that operates the scraping member in an inclined state in contact with a road. 3. The tilting mechanism includes three links, and the three links and a part of the scraping member constitute a quadrangular link mechanism. The smoke ash treatment device according to claim 2, wherein the scraping member maintains a vertical state. 4. The smoke ash treatment apparatus according to claim 1, wherein the lower edge of the scraping member is formed by a pipe attached along a lower portion of the scraping member.