CN217504386U

CN217504386U - Flue gas purification system for submerged arc furnace

Info

Publication number: CN217504386U
Application number: CN202221190944.6U
Authority: CN
Inventors: 李宏民; 杨斌
Original assignee: Longnan Xiongwei Wanli New Material Co ltd
Current assignee: Longnan Xiongwei Wanli New Material Co ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-09-27
Anticipated expiration: 2032-05-18

Abstract

The utility model discloses a flue gas purification system of a submerged arc furnace, which comprises the submerged arc furnace, a gas collecting hood, a gas mixing bin, a feeding bin, a heat exchange device, a cyclone dust collector, a bag-type dust collector and a draught fan, wherein a smoke outlet, a feeding port and a furnace outlet of the submerged arc furnace are respectively provided with a first gas collecting hood, a second gas collecting hood and a third gas collecting hood; each gas collecting channel passes through the air inlet intercommunication in pipeline and gas mixing storehouse, it is equipped with the intermediate layer storehouse to go up all around of feed bin lateral wall, the gas outlet in gas mixing storehouse and the air inlet intercommunication in intermediate layer storehouse, set up heat transfer device between the gas outlet in intermediate layer storehouse and the cyclone, sack cleaner and draught fan are connected gradually to cyclone's gas outlet, set up the fan in the gas mixing storehouse. The utility model discloses the flue gas to the hot stove smelting in-process in ore deposit production carries out the integration and purifies comprehensively, mixes each way flue gas through the gas mixing storehouse buffering for flue gas purification system steady operation, the fault repair rate reduces, and the life-span is prolonged greatly, and the running cost reduces by a wide margin, and then has guaranteed the cost control of product.

Description

Flue gas purification system for submerged arc furnace

Technical Field

The utility model belongs to the technical field of flue gas purification, in particular to hot stove flue gas purification system in ore deposit.

Background

The ore-smelting furnace is a common industrial electric furnace, and is mainly used for smelting ferrosilicon, ferromanganese, ferrochromium, ferrotungsten, silicomanganese and other ferroalloys. In the smelting process, a large amount of flue gas is generated at each stage, so a dust removal and purification system is usually matched with the flue gas.

The flue gas dust removal purification equipment in the prior art is provided with relevant equipment by adopting a multipoint separate purification mode aiming at flue gas generated by a smoke outlet of the submerged arc furnace and flue gas generated by other structural parts of the submerged arc furnace. Theoretically, the superior dust removal effect is not ideal in actual operation, because the smoke at the scattered part is insufficient and unstable, and the operation of the purification and dust removal equipment which is dispersedly configured is unfavorable.

Particularly, the flue gas of the submerged arc furnace is special, the flue gas at a smoke outlet is high in temperature, the flue gas at other parts of the submerged arc furnace is not low in temperature, the high-temperature gas is generally cooled when the flue gas enters the purifying equipment, so that the purifying equipment is ensured to run stably, the multipoint flue gas purifying device needs to be provided with a plurality of sets of cooling equipment, the running cost is extremely high, and the cost is transferred to the product cost, so that the modification is urgently needed.

And the field personnel propose that the raw materials enter the feeding bin for feeding after being mixed to prepare feeding before entering the submerged arc furnace for smelting, the temperature of the raw materials is low, the temperature of the flue gas is high, if primary heat exchange can be carried out at a flue gas outlet and before the raw materials enter the furnace, the raw materials can be fully preheated and the flue gas can be cooled, and a foundation is laid for the subsequent cooling and purification of the flue gas.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hot stove flue gas purification system in ore deposit aims at solving the problem that prior art exists among the above-mentioned background art.

In order to achieve the above object, the utility model adopts the following technical scheme:

a flue gas purification system of an ore smelting furnace comprises the ore smelting furnace, a gas collecting hood, a gas mixing bin, a feeding bin, a heat exchange device, a cyclone dust collector, a bag-type dust collector and a draught fan, wherein a smoke outlet, a feeding port and a furnace outlet of the ore smelting furnace are respectively provided with a first gas collecting hood, a second gas collecting hood and a third gas collecting hood; each gas collecting channel passes through the air inlet intercommunication in pipeline and gas mixing storehouse, it is equipped with the intermediate layer storehouse to go up all around of feed bin lateral wall, the gas outlet in gas mixing storehouse and the air inlet intercommunication in intermediate layer storehouse, set up heat transfer device between the gas outlet in intermediate layer storehouse and the cyclone, sack cleaner and draught fan are connected gradually to cyclone's gas outlet, set up the fan in the gas mixing storehouse.

The exhaust port of the hot stove in ore deposit, feed inlet and tap hole set up the dust cage respectively, the flue gas that the hot stove smelting in-process of ore deposit produced is collected and filtered all-round, it is first, second and third dust cage communicate with the gas mixing storehouse respectively, make different smelting stages, fully mix in the common leading-in gas mixing storehouse of flue gas that the different positions produced, gas after will mixing is stably carried to the intermediate layer storehouse that sets up in last feed bin lateral wall again, be used for heating raw and other materials, promote smelting efficiency, the high temperature flue gas in intermediate layer storehouse gets into filter in cyclone and the sack cleaner in proper order after passing through the indirect heating equipment cooling.

Furthermore, the air inlet of the air mixing bin is arranged at the lower part of the side wall of the air mixing bin, the air outlet of the air mixing bin is arranged at the top of the air mixing bin, and the fan is arranged at the center of the bottom of the inner side of the air mixing bin.

Further, the heat exchange device adopts circulating water for heat exchange.

Further, the air inlet of sack cleaner is equipped with temperature sensor, and the sack cleaner is connected with the air-cooler, temperature sensor and air-cooler all are connected to the controller.

Compare in prior art's shortcoming and not enough, the utility model discloses following beneficial effect has:

1. the utility model provides a hot stove flue gas purification system in ore deposit sets up the gas collecting channel respectively through exhaust port, material loading mouth and the mouth of coming out of the stove at the hot stove in ore deposit, and the integration purifies the flue gas that the hot stove smelting in-process in ore deposit produced comprehensively, sets up the flue gas that gas mixing storehouse buffering and intensive mixing were collected, provides stable flue gas for flue gas dust collecting equipment to guarantee dust collecting equipment's steady operation.

2. The gas outlet in gas mixing storehouse is connected with the air inlet that sets up in last feed bin lateral wall intermediate layer storehouse all around, and hot flue gas can preheat the raw and other materials of treating to be smelted on the one hand, promotes smelting efficiency and quality, and the on the other hand flue gas has obtained preliminary cooling, provides good basis for follow-up heat transfer device's cooling for heat transfer device's cooling effect is better, has practiced thrift the cost.

3. The sack cleaner is equipped with temperature sensor and air-cooler, and when the air intake temperature exceeded the default, the leading-in cold wind cooling of start-up air-cooler, avoided too high smoke and dust temperature to damage the sack, lifting means's life.

4. The utility model discloses a structural grouping for flue gas purification system steady operation, the fault repair rate reduces, and the life-span prolongs greatly, and the running cost reduces by a wide margin, and then has guaranteed the cost control of product.

Drawings

FIG. 1 is a schematic diagram of a frame structure of a flue gas purification system of a submerged arc furnace of the present invention.

Fig. 2 is the internal structure diagram of the gas mixing chamber of the present invention.

Fig. 3 is a schematic cross-sectional view a-a' in fig. 2.

In the figure: 1-a submerged arc furnace; 21-a first gas-collecting channel; 22 a second gas-collecting channel; 23-a third gas-collecting channel; 3-a gas mixing bin; 31-an air inlet; 32-air outlet; 33-heat resistant fan; 4-feeding the material into a bin; 5-interlayer cabin; 6-a heat exchange device; 7-a cyclone dust collector; 8-bag dust collector; 9-induced draft fan.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1, a flue gas purification system of a submerged arc furnace comprises the submerged arc furnace 1, a gas collecting hood, a gas mixing bin 3, a feeding bin 4, a cyclone dust collector 7, a bag-type dust collector 8 and a draught fan 9, wherein the gas collecting hood comprises a first gas collecting hood 21 arranged at a smoke outlet of the submerged arc furnace 1, a second gas collecting hood 22 arranged at a feed inlet of the submerged arc furnace 1 and a third gas collecting hood 23 arranged at a furnace outlet of the submerged arc furnace 1, the flue gas generated at the smoke outlet of the submerged arc furnace 1 is high in temperature and continuously generated along with the smelting process of the submerged arc furnace, the flue gas generated at the feed inlet of the submerged arc furnace 1 is mainly smoke generated in the raw material feeding process, is low in temperature and is only generated in the feeding process, and the flue gas generated at the furnace outlet of the submerged arc furnace 1 is high in temperature and is only generated during discharging; referring to fig. 2, the first, second and third gas collecting hoods are all connected to the gas mixing bin 3 through pipelines to be uniformly mixed, the gas mixing bin 3 is cylindrical, the top of the gas mixing bin is provided with a gas outlet 32, the lower part of the side wall is provided with a gas inlet 31, the preferred gas inlets are circumferentially and uniformly arranged on the side wall of the gas mixing bin to mix the flue gas introduced by each gas collecting hood, thereby avoiding sudden increase of gas emission caused by the flue gas generated in the charging and discharging processes and influencing the stability of the flue gas purification equipment, the interlayer bin 5 is arranged around the side wall of the charging bin 4 of the submerged arc furnace 1, the gas outlet 32 of the gas mixing bin 3 is connected with the gas inlet of the interlayer bin 5 through a pipeline, the high-temperature flue gas enters the interlayer bin 5 to preheat the raw material to be smelted, the smelting efficiency is improved, the high-temperature flue gas is correspondingly cooled, the gas outlet of the interlayer bin 5 is sequentially connected with a heat exchange device 6, a cyclone dust collector 7, a bag dust collector 8 and a draught fan 9 through pipelines, the heat exchange device 6 is used for thoroughly cooling high-temperature flue gas to protect the normal operation of the dust removal equipment, the cyclone dust collector 7 is used for removing large-particle-size substances in the flue gas, the bag-type dust collector 8 is used for finely filtering the flue gas, and the induced draft fan 9 is used for providing power for the flue gas purification system.

Referring to fig. 3, a mixing device is arranged in the gas mixing bin 3, the mixing device 3 is specifically a heat-resistant fan 33, each gas collecting hood conveys high-temperature flue gas to the gas mixing bin 3, and the heat-resistant fan 33 further mixes the gas to provide stable pressure and flow flue gas for subsequent cooling and dust removing equipment.

The heat exchange device 6 can adopt circulating water heat exchange equipment.

The air intake of sack cleaner 8 is equipped with temperature sensor, real-time supervision flue gas temperature, and 8 lateral walls of sack cleaner are connected with the air-cooler, and air-cooler and temperature sensor are connected to the controller respectively, and when flue gas temperature was greater than 8 furthest of sack cleaner, the controller started the air-cooler to the flue gas cooling, avoided filtering the sack because of high temperature damage, influence flue gas filter effect.

The utility model provides a hot stove flue gas purification system in ore deposit sets up the leading-in gas mixing storehouse of gas collecting channel with the feed inlet of the hot stove in ore deposit, exhaust port and the flue gas of tapping hole and mixes, provides the high temperature smoke and dust of steady pressure and flow for flue gas purification system, avoids influencing dust collecting equipment's normal operation because of the unstability of flue gas flow and pressure, and the high temperature flue gas can be used to heat the raw and other materials in feed bin 4, promotes and smelts efficiency to finally filter through cyclone and sack cleaner. The submerged arc furnace flue gas purification system simultaneously and intensively processes flue gas at a feed inlet, a smoke outlet and a furnace outlet of the submerged arc furnace, effectively improves the stability of the flue gas, and ensures the stable operation of the dust removal equipment.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A flue gas purification system of a submerged arc furnace is characterized by comprising the submerged arc furnace, a gas collecting hood, a gas mixing bin, a feeding bin, a heat exchange device, a cyclone dust collector, a bag-type dust collector and a draught fan, wherein a smoke outlet, a feeding port and a furnace outlet of the submerged arc furnace are respectively provided with a first gas collecting hood, a second gas collecting hood and a third gas collecting hood; each gas collecting channel passes through the air inlet intercommunication in pipeline and gas mixing storehouse, it is equipped with the intermediate layer storehouse to go up all around of feed bin lateral wall, the gas outlet in gas mixing storehouse and the air inlet intercommunication in intermediate layer storehouse, set up heat transfer device between the gas outlet in intermediate layer storehouse and the cyclone, sack cleaner and draught fan are connected gradually to cyclone's gas outlet, set up the fan in the gas mixing storehouse.

2. The submerged arc furnace flue gas cleaning system according to claim 1, wherein the gas inlet of the gas mixing bin is arranged at the lower part of the side wall thereof, the gas outlet is arranged at the top thereof, and the fan is arranged at the center of the bottom of the inner side thereof.

3. The submerged arc furnace flue gas cleaning system according to claim 1, characterized in that the heat exchange means uses circulating water for heat exchange.

4. The submerged arc furnace flue gas purification system according to claim 1, wherein the air inlet of the bag-type dust remover is provided with a temperature sensor, the bag-type dust remover is connected with an air cooler, and the temperature sensor and the air cooler are both connected to the controller.