CN219390569U

CN219390569U - Metallurgical waste heat recovery device for auxiliary heating of dust remover

Info

Publication number: CN219390569U
Application number: CN202320576743.8U
Authority: CN
Inventors: 汪波; 陈珂; 张浩浩; 黄丹; 叶智
Original assignee: China City Environment Protection Engineering Ltd
Current assignee: China City Environment Protection Engineering Ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-07-21
Anticipated expiration: 2033-03-22

Abstract

The utility model discloses a device for auxiliary heating of a dust remover by metallurgical waste heat recovery, which comprises a dust remover, a surface cooler and a fan, wherein the surface cooler is communicated with the dust remover and used for absorbing heat in high-temperature flue gas to heat air; the surface cooler is provided with a smoke inlet, a smoke outlet and a hot air outlet, and is provided with a cold air sleeve sealing cover; the lower part of the dust remover is provided with an ash bucket; the smoke inlet is externally connected with high-temperature smoke, the smoke outlet is connected with a dust remover pipeline, and the hot air outlet is connected with an air inlet pipeline of the fan; a plurality of diversion trenches are longitudinally arranged along the outer wall of the ash bucket, one ends of the diversion trenches are mutually communicated through an air inlet pipe, the other ends of the diversion trenches are mutually communicated through an air outlet pipe, and an air outlet of the fan is communicated with the air inlet pipe; can fully heat the whole ash bucket, effectively avoid the ash bucket to be blocked by the agglomeration of dust and water vapor in the ash bucket, and influence the practicability of the dust remover.

Description

Metallurgical waste heat recovery device for auxiliary heating of dust remover

Technical Field

The utility model relates to the field of metallurgical waste heat recycling, in particular to a device for auxiliary heat of a dust remover by metallurgical waste heat recycling.

Background

In order to further improve the utilization value of blast furnace dust produced in the production process of domestic steel plants, the scheme generally adopted at present adopts a rotary hearth furnace and rotary kiln system to extract iron-containing slag and kiln slag, and the iron-containing slag and kiln slag are returned to the steel plants as iron-making raw materials, so that zinc-containing dust captured by surface cooler sedimentation and bag-type dust collectors is extracted and sold to zinc-making plants, and the comprehensive utilization of the blast furnace dust is realized. A large amount of high-temperature flue gas can be generated in the rotary hearth furnace and the rotary kiln process system, the high-temperature flue gas is directly discharged into the atmosphere, heat waste is serious, the high-temperature flue gas contains a large amount of dust, dust removal treatment is needed before discharge, a dust remover is commonly used in the dust removal process, an electric auxiliary heating device is commonly needed in the dust remover, and heating wires are arranged on the inner wall of the dust remover and an ash bucket of the dust remover to heat, so that the interior of the dust remover is kept in a dry atmosphere, and the dust and water vapor in the dust remover and the ash bucket are prevented from being combined and condensed into a block, and the dust removal effect of the dust remover is affected.

Disclosure of Invention

Aiming at the problem that the dust removal efficiency is affected by the easy agglomeration of the inside of the existing dust remover in the use process, the metallurgical waste heat recovery device is provided for the auxiliary heat of the dust remover, and the metallurgical waste heat recovery device can be used for the auxiliary heat of the dust remover.

The specific technical scheme is as follows: an apparatus for metallurgical waste heat recovery for dust collector co-heating, having the features comprising: the surface air cooler is communicated with the dust remover and used for absorbing heat in high-temperature flue gas to heat air;

in the device, the surface cooler is provided with a smoke inlet, a smoke outlet, an air inlet, a hot air outlet and a cold air sleeve sealing cover; the lower part of the dust remover is provided with an ash bucket; the smoke inlet is externally connected with high-temperature smoke, the smoke outlet is connected with the dust remover pipeline, and the hot air outlet is connected with the air inlet pipeline of the fan; a plurality of diversion trenches are longitudinally arranged along the outer wall of the ash bucket, one ends of the diversion trenches are mutually communicated through an air inlet pipe, the other ends of the diversion trenches are mutually communicated through an air outlet pipe, and an air outlet of the fan is communicated with the air inlet pipe.

The device for auxiliary heating of the dust remover by using metallurgical waste heat recovery has the following characteristics: the ash bucket is of a quadrangular frustum pyramid structure.

The device for auxiliary heating of the dust remover by using metallurgical waste heat recovery has the following characteristics: the four outer walls of the ash bucket are respectively provided with the diversion trenches.

The device for auxiliary heating of the dust remover by using metallurgical waste heat recovery has the following characteristics: the surface cooler is provided with an insulating layer on a pipeline communicated with the fan, and an insulating layer is arranged on a pipeline communicated with the air inlet pipe at the outlet of the fan.

The device for auxiliary heating of the dust remover by using metallurgical waste heat recovery has the following characteristics: the dust remover is a cloth bag dust remover.

The beneficial effect of above-mentioned scheme is:

1. the surface cooler is sleeved with a cold air sleeve sealing cover, two opposite side surfaces of the cold air sleeve sealing cover are respectively provided with an air inlet and a hot air outlet, the hot air outlet is connected with a fan pipeline, and the fan transmits heated air into a diversion trench to assist in heating an ash bucket; the heat exchange efficiency of the surface air cooler is improved, energy is saved, and the environment is protected.

2. According to the utility model, the four outer walls of the quadrangular frustum-shaped ash bucket are respectively provided with the longitudinal diversion trenches, the fan is adopted to convey heated air into the diversion trenches to assist heat of the ash bucket, and compared with the existing annular auxiliary heat pipeline arranged on the inner wall of the ash bucket, the annular auxiliary heat pipeline is characterized in that the heated high-temperature air can be conveyed from the top wide opening of the ash bucket to the lower narrow opening to assist heat of the ash bucket, so that the whole ash bucket can be fully heated, and the phenomenon that dust and water vapor in the ash bucket are condensed into blocks to block the ash bucket is effectively avoided, and the use of the dust remover is influenced.

Drawings

FIG. 1 is a schematic view of the ash bucket construction of the present utility model;

FIG. 2 is a schematic diagram of the surface cooler of the present utility model;

FIG. 3 is a schematic diagram of the connection structure of the dust remover, the surface cooler and the fan;

wherein, 1-dust remover; 10-ash bucket; 11-diversion trenches; 12-an air inlet pipe; 13-an air outlet pipe; 2-a surface cooler; 20-a smoke inlet; 21-a smoke outlet; 22-a hot air outlet; 23 a cold air sleeve sealing cover; 24-air inlet; 3-a fan.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described in the following in conjunction with the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

The utility model will be further illustrated, but is not limited, by the following examples.

An embodiment of the utility model provides a device for auxiliary heating of a dust remover by metallurgical waste heat recovery, which comprises a dust remover 1, a surface cooler 2 communicated with the dust remover 1 and used for absorbing heat in high-temperature flue gas to heat air, and a fan 3 communicated with the surface cooler 2; in the embodiment, a smoke inlet 20, a smoke outlet 21, an air inlet 24, a hot air outlet 22 and a cold air sleeve sealing cover 23 are arranged on the surface cooler 2; the lower part of the dust remover 1 is provided with an ash bucket 10; the smoke inlet 20 is externally connected with high-temperature smoke, the smoke outlet 21 is connected with a pipeline of the dust remover 1, and the hot air outlet 22 is connected with an air inlet pipeline of the fan 3; a plurality of diversion trenches 11 are longitudinally arranged along the outer wall of the ash bucket 10, one ends of the diversion trenches 11 are mutually communicated through an air inlet pipe 12, the other ends of the diversion trenches 11 are mutually communicated through an air outlet pipe 13, and an air outlet of the fan 3 is communicated with the air inlet pipe 12.

In some preferred embodiments, the ash bucket 10 is in a quadrangular frustum pyramid structure, and a plurality of diversion trenches 11 are arranged on four outer walls of the ash bucket 10.

Specifically, as shown in fig. 1-2: a plurality of diversion trenches 11 are longitudinally arranged along the outer wall of the ash bucket 10, one end of each diversion trench 11 on each side wall is mutually communicated through an air inlet pipe 12, the other ends of the diversion trenches 11 are mutually communicated through an air outlet pipe 13, an air outlet of the fan 3 is communicated with the air inlet pipe 12, and the air outlet of the fan 3 conveys high-temperature air to the diversion trenches 11 for auxiliary heating. In patent document CN218011748U, a circumferential heat energy reflux utilization device is arranged on the inner wall of the ash bucket, after the high-temperature flue gas in the heat energy reflux utilization device enters the ash bucket, auxiliary heat is gradually carried out from the narrow opening at the lower part of the ash bucket to the wide opening at the upper part, because of the upper wide-lower narrow structural design of the ash bucket, the wide opening needs more heat to carry out auxiliary heat, but after the high-temperature flue gas enters the heat energy reflux utilization device, the temperature of the high-temperature flue gas is gradually reduced along with the auxiliary heat, so that the auxiliary heat at the wide opening of the ash bucket, which needs more heat, is insufficient, and dust still has the risk of condensing into blocks. In the utility model, the air inlet pipe 12 can be arranged at the upper wide opening of the ash bucket 10, heated air is conveyed from the wide opening of the ash bucket 10 to the narrow opening of the lower part, and the wide opening of the ash bucket 10 with larger heat demand is preferentially heated, so that the whole ash bucket 10 can be fully heated, and the ash bucket 10 is effectively prevented from being blocked due to the fact that dust and water vapor in the ash bucket 10 are condensed into blocks.

Specifically, as shown in fig. 2 and fig. 3: the surface cooler 2 is provided with a smoke inlet 20 and a smoke outlet 21, a cold air sleeve sealing cover 23 is sleeved outside the surface cooler 2, and two opposite side surfaces of the cold air sleeve sealing cover 23 are respectively provided with an air inlet 24 and a hot air outlet 22; the surface cooler 2 can heat the air flowing through the cold air sleeve sealing cover 23, and the heated air is conveyed to the ash bucket for auxiliary heating by the fan 3.

In some preferred embodiments, the heat-insulating layer is arranged on a pipeline of the surface cooler 2 communicated with the fan 3, and the heat-insulating layer is arranged on a pipeline of the air outlet of the fan 3 communicated with the air inlet pipe 12.

Specifically, as shown in fig. 1 and fig. 3, an air inlet at one side of the fan 3 is communicated with a hot air outlet 22 of the surface air cooler 2, and an air outlet of the fan 3 is communicated with an air inlet pipe 12; the hot air outlet 22 of the surface air cooler 2 is communicated with the air inlet of the fan 3, a heat preservation layer is arranged on a pipeline of the surface air cooler 2 communicated with the fan 3, and a heat preservation layer is arranged on a pipeline of the air outlet of the fan 3 communicated with the air inlet pipe 2, so that the heat loss of high-temperature air in the conveying process of the pipeline can be avoided.

In some preferred embodiments, the dust collector 1 is a bag-type dust collector.

The foregoing is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the embodiments and scope of the present utility model, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the teachings of the present utility model, which are intended to be included within the scope of the present utility model.

Claims

1. A metallurgical waste heat recovery device for dust collector auxiliary heat, comprising: the device comprises a dust remover (1), a surface cooler (2) communicated with the dust remover (1) and used for absorbing heat in high-temperature flue gas to heat air, and a fan (3) communicated with the surface cooler (2);

the surface cooler (2) is provided with a smoke inlet (20), a smoke outlet (21), an air inlet (24), a hot air outlet (22) and a cold air sleeve sealing cover (23); an ash bucket (10) is arranged at the lower part of the dust remover (1); the smoke inlet (20) is externally connected with high-temperature smoke, the smoke outlet (21) is connected with the dust remover (1) through a pipeline, and the hot air outlet (22) is connected with the air inlet pipeline of the fan (3); a plurality of diversion trenches (11) are longitudinally arranged along the outer wall of the ash bucket (10), one ends of the diversion trenches (11) are mutually communicated through an air inlet pipe (12), the other ends of the diversion trenches (11) are mutually communicated through an air outlet pipe (13), and an air outlet of the fan (3) is communicated with the air inlet pipe (12).

2. The apparatus for metallurgical waste heat recovery for the auxiliary heating of a dust collector according to claim 1, wherein the ash bucket (10) is of a quadrangular frustum configuration.

3. The metallurgical waste heat recovery device for auxiliary heating of a dust collector according to claim 2, characterized in that the flow guide grooves (11) are provided on all four outer walls of the ash bucket (10).

4. The device for auxiliary heating of the dust remover according to claim 3, wherein a heat preservation layer is arranged on a pipeline of the surface cooler (2) communicated with the fan (3), and a heat preservation layer is arranged on a pipeline of an outlet of the fan (3) communicated with the air inlet pipe (12).

5. The apparatus for metallurgical waste heat recovery for dust collector co-heating according to any one of claims 1-4, wherein the dust collector (1) is a bag-type dust collector.