阅读说明：本技术 一种HIsmelt熔融还原炉高温煤气干法净化余热回收系统及新工艺 (Dry-method purification waste heat recovery system and new process for high-temperature coal gas of HIsmelt smelting reduction furnace ) 是由 周春林 兰大伟 周杨 王芳 于 2019-09-24 设计创作，主要内容包括：本发明是有关于一种HIsmelt熔融还原炉高温煤气干法净化余热回收系统及新工艺,该系统包括汽化冷却烟道、煤气混合调温室、旋风除尘器、高温布袋除尘器、余热装置、风机。HIsmelt熔融还原炉高温煤气经过汽化冷却烟道回收余热及降温后温度达到800℃-900℃,进入煤气混合调温室与低温回流风抽回的低温煤气混合将煤气温度调至工艺所需值,通过管道进入旋风除尘器进行初除尘,经过初除尘后的煤气进入高温布袋除尘器,精除尘后烟尘浓度小于10mg/Nm<Sup>3</Sup>,经过两级除尘后的洁净煤气进入余热装置进行余热回收,煤气温度降至约200℃,净化后煤气供用户及现场使用。本发明流程顺畅,避免了余热装置粘渣结垢,提高余热装置换热效率,增加使用寿命,采用高温布袋除尘器净化煤气,节省了水资源。(The invention relates to a dry purification waste heat recovery system and a new process for high-temperature coal gas of a HIsmelt smelting reduction furnace. High-temperature coal gas of the HIsmelt reduction furnace is subjected to waste heat recovery and temperature reduction through a vaporization cooling flue, the temperature reaches 800-900 ℃, the high-temperature coal gas enters a coal gas mixing temperature-adjusting chamber to be mixed with low-temperature coal gas pumped by low-temperature return air, the temperature of the coal gas is adjusted to a value required by the process, the coal gas enters a cyclone dust collector through a pipeline to be subjected to primary dust removal, the coal gas subjected to primary dust removal enters a high-temperature bag dust collector, and the concentration of smoke dust after the fine dust removal is less than 3 And the clean coal gas after two-stage dust removal enters a waste heat device for waste heat recovery, the temperature of the coal gas is reduced to about 200 ℃, and the purified coal gas is supplied to users and sites. The invention has smooth flow, avoids slag adhesion and scaling of the waste heat device, and improves the residualThe hot charging replacement heat efficiency is increased, the service life is prolonged, and the high-temperature bag-type dust collector is adopted to purify the coal gas, so that the water resource is saved.)

1. A HIsmelt smelting reduction furnace high-temperature coal gas dry purification waste heat recovery system is characterized in that: comprises a vaporization cooling flue (2), a coal gas mixing temperature regulating chamber (3), a cyclone dust collector (4), a high-temperature bag-type dust collector (5), a waste heat device (6), a low-temperature coal gas return pipeline and a fan (7), wherein the HIsmelt smelting reduction furnace (1) is connected with the coal gas mixing temperature regulating chamber (3) through the vaporization cooling flue (2), the coal gas mixing temperature regulating chamber (3) is connected with the cyclone dust collector (4) through a pipeline, the cyclone dust collector (4) is connected with the high-temperature bag-type dust collector (5) through a pipeline, the high-temperature bag-type dust collector (5) is connected with the waste heat device (6) through a pipeline, the fan (7) is respectively connected with the coal gas mixing temperature regulating chamber (3) and an outlet pipeline of the waste heat device (6) through the low-temperature coal gas return pipeline, the fan (7) is connected with the coal gas mixing temperature regulating chamber (3) and the waste heat device (6) through the low-temperature coal gas return pipeline, low-temperature gas reflux is realized, and the waste heat device (6) finally supplies the gas to users or provides field use through pipelines.

2. The dry purification waste heat recovery system for high-temperature coal gas of the HIsmelt reduction furnace according to claim 1, which is characterized in that: the temperature adjusting medium for adjusting the temperature of the gas mixing temperature adjusting chamber (3) is gas generated by the process.

3. The HIsmelt smelting reduction furnace high-temperature gas dry purification waste heat recovery system according to claim 1, wherein the high-temperature bag dust collector (5) adopts a high-temperature resistant and corrosion resistant high-temperature filter cylinder as a fine dust removal element, and the concentration of smoke dust after fine dust removal is less than 10mg/Nm³。

4. The new process of the HIsmelt smelting reduction furnace high-temperature gas dry purification waste heat recovery system according to the claims 1 to 3 is characterized by comprising the following steps:

step 1: high-temperature coal gas of the HIsmelt smelting reduction furnace passes through a vaporization cooling flue (2) to recover waste heat and is cooled to reach the temperature of 800-900 ℃;

step 2: the gas enters a gas mixing and temperature adjusting chamber (3), the gas mixing and temperature adjusting chamber (3) fully mixes the high-temperature gas discharged from the vaporization cooling flue and the low-temperature gas pumped by the low-temperature gas backflow air for adjusting the temperature of the gas to a value required by the process;

and step 3: the coal gas after the coal gas mixing and temperature adjustment enters a cyclone dust collector (4) through a pipeline for primary dust collection to remove large-particle dust;

and 4, step 4: the coal gas primarily dedusted by the cyclone dust collector (4) enters the high-temperature bag-type dust collector (5) through a pipeline for fine dedusting, and the high-temperature bag-type dust collector (5) is arranged in front of the waste heat device (6);

and step 3: the coal gas after temperature adjustment is subjected to fine dust removal by a high-temperature bag-type dust remover (5) and then enters a waste heat device (6) for waste heat recovery.

And 4, step 4: the coal gas recovered by the waste heat device (6) can be directly used by users and field use points, and the sensible heat carried by the coal gas can be utilized to reduce the energy consumption of the users.

Technical Field

The invention relates to a high-temperature coal gas purification waste heat recovery system of a HIsmelt smelting reduction furnace in the field of dust removal in the pyrometallurgical industry, in particular to a high-temperature coal gas dry purification waste heat recovery system of the HIsmelt smelting reduction furnace and a new process.

Background

The HIsmelt smelting reduction furnace can generate high-temperature coal gas in the smelting process. The temperature of the high-temperature coal gas can reach more than 1500 ℃, the high-temperature coal gas contains a large amount of sensible heat, and the coal gas also contains a large amount of sticky iron slag particles, so that energy waste can be caused if the high-temperature coal gas is not treated, and the use of subsequent users is influenced.

The existing common system has a wet method, and the smoke temperature entering the waste heat device in the wet method system is too high and reaches 800 ℃, so that slag particles in a molten state are mixed in the smoke and can be bonded on the waste heat device, the heat exchange efficiency of the waste heat device is low, and the energy waste is caused; and wet dedusting can cause water resource waste and relatively lower smoke dust removal rate.

In view of the problems of the high-temperature coal gas purification and waste heat recovery system of the conventional HIsmelt smelting reduction furnace, the inventor of the invention actively researches and innovates to create a novel high-temperature coal gas dry purification and waste heat recovery process of the HIsmelt smelting reduction furnace with a novel structure, and can improve the high-temperature coal gas purification and waste heat recovery process of the conventional HIsmelt smelting reduction furnace, so that the HIsmelt smelting reduction furnace has higher practicability.

Disclosure of Invention

The invention aims to overcome the problems of the high-temperature coal gas purification waste heat recovery system and the high-temperature coal gas purification waste heat recovery process of the conventional HIsmelt smelting reduction furnace, provides a new high-temperature coal gas dry purification waste heat recovery system and a new process of the HIsmelt smelting reduction furnace, and aims to solve the technical problems that the waste heat recovery equipment has high failure rate, the failure rate of the waste heat recovery equipment is reduced, the operation is stable, the residual heat recovery efficiency is increased,

the invention also aims to overcome the defects of the high-temperature coal gas purification waste heat recovery system and the high-temperature coal gas purification waste heat recovery process of the conventional HIsmelt smelting reduction furnace, and provides a new high-temperature coal gas dry purification waste heat recovery system and a new process of the HIsmelt smelting reduction furnace, aiming at solving the technical problems of wasting a large amount of sensible heat and containing a large amount of sticky iron slag particles in coal gas, increasing the recovery efficiency of the rest heat, reducing the water resource consumption, realizing the purposes of energy conservation and emission reduction and being more suitable for practical use.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. The HIsmelt smelting reduction furnace high-temperature coal gas dry purification waste heat recovery system comprises a vaporization cooling flue, a coal gas mixing temperature regulating chamber, a cyclone dust collector, a high-temperature bag dust collector, a waste heat device, a low-temperature coal gas return pipeline and a fan, wherein the HIsmelt smelting reduction furnace is connected with the coal gas mixing temperature regulating chamber through the vaporization cooling flue, the coal gas mixing temperature regulating chamber is connected with the cyclone dust collector through a pipeline, the cyclone dust collector is connected with the high-temperature bag dust collector through a pipeline, the high-temperature bag dust collector is connected with the waste heat device through a pipeline, the fan is respectively connected with the coal gas mixing temperature regulating chamber and an outlet pipeline of the waste heat device through the low-temperature coal gas return pipeline, the fan is connected with the coal gas mixing temperature regulating chamber and the waste heat device through the low-temperature coal gas return pipeline to realize low-temperature coal gas return, the waste heat device finally supplies the coal gas to users or provides field use through pipelines. The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

In the high-temperature coal gas dry purification waste heat recovery system for the HIsmelt smelting reduction furnace, the temperature regulating medium used for regulating the temperature of the coal gas mixing temperature regulating chamber is coal gas generated by the process.

The high-temperature coal gas dry purification waste heat recovery system of the HIsmelt smelting reduction furnace is characterized in that the high-temperature bag-type dust remover adopts a high-temperature filter cylinder with high temperature resistance and corrosion resistance as a fine dust removal element, and the concentration of smoke dust after fine dust removal is less than 10mg/Nm³。

The purpose of the invention and the technical problem to be solved are also realized by adopting the following technical scheme. The novel process of the high-temperature coal gas dry purification waste heat recovery system of the HIsmelt smelting reduction furnace provided by the invention comprises the following steps of:

step 1: high-temperature coal gas of the HIsmelt smelting reduction furnace passes through an evaporation cooling flue to recover waste heat and is cooled to reach the temperature of 800-900 ℃;

step 2: the high-temperature coal gas discharged from the vaporization cooling flue and the low-temperature coal gas pumped back by the low-temperature coal gas backflow air are fully mixed and adjusted in temperature by the coal gas mixing and adjusting chamber, and the temperature of the coal gas is adjusted to a value required by the process;

and step 3: the coal gas after the coal gas mixing and temperature adjustment enters a cyclone dust collector through a pipeline for primary dust removal, and large particle dust is removed;

and 4, step 4: the coal gas primarily dedusted by the cyclone deduster enters the high-temperature bag deduster through a pipeline for fine dedusting, and the high-temperature bag deduster is arranged in front of the waste heat device;

and step 3: the coal gas after temperature adjustment is subjected to fine dust removal by a high-temperature bag-type dust remover and then enters a waste heat device for waste heat recovery.

And 4, step 4: the coal gas recovered by the waste heat device can be directly used by users and field use points, and the sensible heat carried by the coal gas can be utilized to reduce the energy consumption of the users.

Compared with the prior art, the invention has obvious advantages and beneficial effects. It has at least the following advantages:

1. the invention adopts a low-temperature coal gas reflux system and a coal gas mixing temperature-regulating chamber to ensure that the temperature of high-temperature coal gas is reduced to the temperature required by the process before entering the cyclone dust collector.

2. The invention can solve the problem of slag adhesion of the waste heat device and improve the waste heat recovery efficiency of the waste heat device.

3. The invention adopts a dry dedusting process, thereby reducing the waste of water resources.

4. The invention prolongs the service life of the boiler and avoids the generation of turbid circulating water.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of the combined structure of the present invention.

Wherein:

1: HIsmelt smelting reduction furnace 2: vaporization cooling flue

3: gas mixing temperature adjusting chamber 4: cyclone dust collector

5: 6, high-temperature bag-type dust collector: waste heat device

7: fan blower

Detailed Description

In order to further illustrate the technical means and effects adopted by the invention to achieve the predetermined purpose, the following detailed description of the system and the novel process for recovering the high-temperature gas dry-cleaning waste heat of the HIsmelt reduction furnace according to the present invention with reference to the accompanying drawings and preferred embodiments shows specific implementation manners, structures, methods, steps, characteristics and effects thereof.

Referring to fig. 1, a dry purification waste heat recovery system for high-temperature gas in a HIsmelt reduction furnace according to a preferred embodiment of the present invention mainly includes: the system comprises a vaporization cooling flue 2, a coal gas mixing temperature adjusting chamber 3, a cyclone dust collector 4, a high-temperature bag dust collector 5, a waste heat device 6 and a fan 7; wherein: the high-temperature coal gas of the HIsmelt reduction furnace 1 is cooled through the vaporization cooling flue 2 and then is connected with the coal gas mixing temperature adjusting chamber 3 through the vaporization cooling flue 2, the coal gas mixing temperature adjusting chamber 3 is connected with the cyclone dust collector 4 through a pipeline, the cyclone dust collector 4 is connected with the high-temperature bag-type dust collector 5 through a pipeline, the high-temperature bag-type dust collector 5 is connected with the waste heat device 6 through a pipeline, the fan 7 is connected with the pipeline behind the waste heat device 6 and the coal gas mixing temperature adjusting chamber 3 to realize low-temperature coal gas backflow, and the waste heat device 6 finally supplies the coal gas to users or provides field use through the pipeline.

Referring to fig. 1, the process steps of the new process for recovering the waste heat of the HIsmelt smelting reduction furnace by high-temperature gas dry purification according to the preferred embodiment of the present invention are as follows:

high-temperature coal gas of the HIsmelt reduction furnace is subjected to waste heat recovery and temperature reduction through the vaporization cooling flue 2, then enters the coal gas mixing temperature adjusting chamber 3, the coal gas mixing temperature adjusting chamber 3 fully mixes high-temperature coal gas discharged from the vaporization cooling flue 2 with low-temperature coal gas pumped by low-temperature coal gas backflow air for temperature adjustment, the temperature of the coal gas is adjusted to a value required by the process, the coal gas subjected to coal gas mixing temperature adjustment enters the cyclone dust collector 4 through a pipeline for primary dust removal, and large-particle dust is removed; the coal gas which is primarily dedusted by the cyclone dust collector 4 enters a high-temperature bag dust collector 5 for fine dedusting, and the high-temperature bag dust collector 5 is arranged in front of the waste heat device 6; the high-temperature bag-type dust collector 5 adopts a high-temperature filter cylinder with high temperature resistance and corrosion resistance as a fine dust collection element, and the concentration of smoke dust after fine dust collection is less than 10mg/Nm³The clean coal gas after two-stage dust removal enters a waste heat device 6 for waste heat recovery, the temperature of the coal gas after the waste heat recovery by the waste heat device 6 is reduced to about 200 ℃, the purified coal gas is supplied to users and sites, and the sensible heat carried by the purified coal gas is utilized to reduce the energy consumption of the users.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, for example, the gas mixing temperature adjusting room can be increased or decreased according to the field situation. Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.