阅读说明：本技术 一种大型化干熄焦用一次除尘器及方法 (Primary dust remover and method for large-scale dry quenching ) 是由 姜乃斌 陈忠峰 范伟 付建华 于民 于 2020-05-27 设计创作，主要内容包括：本发明涉及一种大型化干熄焦用一次除尘器及方法,其在一端设置进气口,内部设置两道后挡墙,底部设置两个灰斗,含有焦粉的惰性循环气体在重力除尘过程中,经历两次惯性除尘,然后从另一侧出口进入锅炉进行热交换。一次除尘器进出口错台设置。本发明结构不复杂,未增大一次除尘器整体的阻力损失,但可大大提高除尘效率。同时,取消上挡墙,去除上挡墙坍塌风险,并且使气流尽量趋于层流状态,减少紊流,防止落入灰斗的焦粉二次卷扬带入,影响除尘效率。(The invention relates to a primary dust remover for large-scale dry quenching and a method thereof, wherein an air inlet is arranged at one end, two rear retaining walls are arranged in the primary dust remover, two ash hoppers are arranged at the bottom, and inert circulating gas containing coke powder undergoes two times of inertial dust removal in the gravity dust removal process and then enters a boiler from an outlet at the other side for heat exchange. The inlet and the outlet of the primary dust remover are arranged in a staggered manner. The invention has uncomplicated structure, does not increase the integral resistance loss of the primary dust remover, but can greatly improve the dust removing efficiency. Simultaneously, cancel the barricade, get rid of the risk that the barricade collapses to make the air current tend to laminar flow state as far as possible, reduce the turbulent flow, prevent that the fine coke secondary that falls into the ash bucket from winding into, influence dust collection efficiency.)

1. A primary dust remover for large-scale dry quenching comprises at least: a primary deduster inlet (4), a primary deduster outlet (5), a first ash bucket (6), a first rear retaining wall (7), a second ash bucket (8) and a second rear retaining wall (9); a high-temperature circulating gas channel which is horizontal and upward is formed between the inlet (4) of the primary dust remover and the outlet (5) of the primary dust remover, and the upward high-temperature circulating gas channel is formed by an L-shaped outlet (5) of the primary dust remover; a first rear retaining wall (7) and a second rear retaining wall (9) are arranged between the primary deduster inlet (4) and the primary deduster outlet (5), and the first rear retaining wall (7) is arranged between the primary deduster inlet (4) and the primary deduster outlet (5) and is vertical to the horizontal high-temperature circulating gas channel; the second rear retaining wall (9) is arranged at the bottom end opening of the L-shaped primary deduster outlet (5), and the first ash bucket (6) and the second ash bucket (8) are respectively arranged at the front ends of the first rear retaining wall (7) and the second rear retaining wall (9).

2. The primary dust collector for large-scale dry quenching coke as claimed in claim 1, which is characterized in that: the height of the first rear retaining wall (7) is 1/4 of the height of the high-temperature circulating gas channel; the height of the second rear retaining wall (9) is 2 times of that of the first rear retaining wall (7).

3. The primary dust collector for large-scale dry quenching coke as claimed in claim 1, which is characterized in that: the first rear retaining wall (7) is arranged at the transition position between the first ash hopper (6) and the second ash hopper (8).

4. The primary dust collector for large-scale dry quenching coke as claimed in claim 1, which is characterized in that: and an upper retaining wall (11) vertical to the high-temperature circulating gas channel is arranged at the upper ends of the first ash hopper (6) and the second ash hopper (8).

5. The primary dust collector for large-scale dry quenching coke as claimed in claim 1, which is characterized in that: the inlet (4) and the outlet (5) of the primary dust remover are arranged in a staggered manner, and the outlet (5) of the primary dust remover is higher than the inlet (4) of the primary dust remover.

6. A method of a primary dust remover for large-scale dry quenching is characterized in that: high-temperature circulating gas containing coke dust enters the primary dust remover from an inlet (4) of the primary dust remover, and gravity dust removal is carried out on a high-temperature circulating gas channel; when part of the circulating gas collides with the first rear retaining wall (7), the gas bypasses the barrier and continues to move forwards upwards, and the coke dust continues to move forwards due to the inertia effect, collides with the first rear retaining wall (7), is captured and falls into the first ash hopper (6); obviously, the higher the movement speed of the circulating gas, the higher the dust removal efficiency; the high-temperature circulating gas containing coke dust continuously flows in the inner part to carry out gravity dust removal; when part of the circulating gas collides with the second rear retaining wall (9), the gas bypasses barriers of the second rear retaining wall (9) upwards, flows out from an upward high-temperature circulating gas channel through the primary deduster outlet (5) and enters the waste heat boiler (3); and the coke dust continues to move forwards due to the inertia effect, collides with the second rear retaining wall (9), is captured and falls into the second dust hopper (8), and accordingly, the dust-containing gas is subjected to two times of inertial dust removal in the primary dust remover.

Technical Field

The invention relates to a dry quenching project, in particular to a primary dust remover and a method for large-scale dry quenching.

Background

In the design of a dry quenching engineering, the temperature of circulating gas from an annular channel of a dry quenching furnace is 900-980 ℃, and a large amount of coke dust is contained. In order to reduce the influence of high-temperature coke dust on the scouring of the whole set of dry quenching equipment, a primary dust remover is adopted for removing coarse coke powder contained in circulating gas so as to reduce the abrasion to a furnace tube of a dry quenching boiler. The primary dust remover adopts gravity to remove dust, and the retention time of the dust-containing circulating gas in the primary dust remover determines the dust removal efficiency of the primary dust remover. Due to the influence of a coke dry quenching site and system resistance loss, the plane length size of the primary dust remover cannot be overlarge, and only the increase of inertial dust removal in the primary dust remover can be considered to increase the dust removal efficiency. The primary dust removal efficiency is high, the abrasion to a boiler tube can be reduced, and the dust removal efficiency of the secondary dust remover can be improved.

Disclosure of Invention

The invention aims to provide a primary dust remover for large-scale dry quenching and a method thereof, so as to improve the dust removal efficiency of the primary dust remover, reduce the abrasion to a boiler tube and improve the dust removal efficiency of a secondary dust remover.

The invention aims to realize the purpose, and the primary dust remover for the large-scale dry quenching comprises at least: the device comprises a primary dust remover inlet, a primary dust remover outlet, a first ash bucket, a first rear retaining wall, a second ash bucket and a second rear retaining wall; a high-temperature circulating gas channel which is horizontal and upward is formed between the inlet of the primary dust remover and the outlet of the primary dust remover, and the upward high-temperature circulating gas channel is formed by an L-shaped outlet of the primary dust remover; a first rear retaining wall and a second rear retaining wall are arranged between the primary deduster inlet and the primary deduster outlet, and the first rear retaining wall is arranged between the primary deduster inlet and the primary deduster outlet and is vertical to the horizontal high-temperature circulating gas channel; the second rear retaining wall is arranged at the bottom port of the outlet of the L-shaped primary dust remover, and the first ash hopper and the second ash hopper are respectively arranged at the front ends of the first rear retaining wall and the second rear retaining wall.

The height of the first rear retaining wall is 1/4 of the height of the high-temperature circulating gas channel; the height of the second back retaining wall is 2 times of that of the first back retaining wall.

The first rear retaining wall is arranged at the transition position between the first ash hopper and the second ash hopper.

The upper ends of the first ash bucket and the second ash bucket are provided with upper retaining walls which are vertical to the high-temperature circulating gas channel.

The inlet and the outlet of the primary dust remover are arranged in a staggered manner, and the outlet of the primary dust remover is higher than the inlet of the primary dust remover.

A method of a primary dust remover for large-scale dry quenching is characterized in that: high-temperature circulating gas containing coke dust enters the primary dust remover from the inlet of the primary dust remover, and gravity dust removal is carried out on the high-temperature circulating gas channel; when part of the circulating gas collides with the first rear retaining wall, the gas bypasses the barrier and continues to move forwards, and the coke dust continues to move forwards due to the inertia effect, collides with the first rear retaining wall 7, is captured and falls into the first ash hopper; obviously, the higher the movement speed of the circulating gas, the higher the dust removal efficiency; the high-temperature circulating gas containing coke dust continuously flows in the inner part to carry out gravity dust removal; when part of the circulating gas collides with the second rear retaining wall, the gas bypasses barriers of the second rear retaining wall upwards, flows out from an upward high-temperature circulating gas channel through an outlet of the primary dust remover and enters the waste heat boiler; and the coke dust continues to move forwards due to the inertia effect, collides with the second rear retaining wall, is captured and falls into the second dust hopper, so that the dust-containing gas is subjected to two times of inertial dust removal in the primary dust remover.

The invention has the beneficial effects that: on the basis of not increasing the length of the primary dust remover, the primary dust remover is designed into two stages of dust hoppers, and a rear retaining wall is added behind each stage of dust hopper to perform inertial dust removal on dust-containing gas. Because the inlet and the outlet of the primary dust remover are arranged in a staggered manner, the arrangement is equivalent to that one-level rotary inertial dust removal is added, so that dust is separated from dust-containing gas in the steering process, and the dust removal efficiency is further increased. Meanwhile, the gas turbulence state at the outlet of the primary dust remover is increased, the scouring damage to a hanging pipe of the waste heat boiler is reduced, and the service life of the hanging pipe is prolonged. The risk of collapse of the upper retaining wall can be eliminated, and the airflow is enabled to be in a laminar state as much as possible, so that the turbulence is reduced.

Drawings

The invention is further illustrated with reference to the accompanying drawings of embodiments:

FIG. 1 is a schematic flow diagram of a coke dry quenching system of the present invention;

FIG. 2 is a structural diagram of a conventional primary dust collector for dry quenching;

FIG. 3 is a schematic structural diagram of a novel primary dust collector for a large-scale dry quenching system according to the invention.

In the figure, 1, a dry quenching furnace; 2. a primary dust remover; 3. a waste heat boiler; 4. an inlet of a primary dust remover; 5. an outlet of the primary dust collector; 6. a first ash hopper; 7. a first rear retaining wall; 8. a second ash hopper; 9. a second rear retaining wall; 10. an ash hopper; 11. an upper retaining wall; 12. high temperature circulating gas channel.

Detailed Description