CN204987666U - High oven coke drying system - Google Patents

Abstract

The utility model relates to a blast furnace coke drying system, which comprises a drying mechanism. The drying mechanism includes a coke tank for accommodating coke. The coke tank is provided with a waste gas outlet and at least one hot waste gas inlet. The waste gas outlet is connected with a dust removal mechanism. It includes a primary dust collector and a secondary dust collector, the primary dust collector is a gravity dust collector or a cyclone dust collector. By using a gravity dust collector or a cyclone dust collector to perform rough dust removal on the dried waste gas, the environment is protected and the pressure of the subsequent fine dust removal process is reduced; while the dust particles in the dried waste gas can be removed, the dried waste gas can also be removed. The moisture in the exhaust gas can prevent the filter bag of the dust collector from fouling, clogging and reducing the dust removal effect in the subsequent fine dust removal process.

Description

Blast furnace coke drying system

technical field

The utility model belongs to the technical field of blast furnace ironmaking, in particular to a blast furnace coke drying system.

Background technique

Coke moisture content has a great impact on blast furnace ironmaking production. Too high coke moisture will cause a series of adverse consequences such as increased coke ratio, affecting road conditions, and reducing the effect of dry bag dust removal. Many iron and steel enterprises in my country rely on outsourcing for the coke they use, and most of them are stacked in the open air. The moisture content of coke fluctuates greatly, especially in seasons with a lot of rain, and the moisture content of coke can reach more than 15%.

At present, the method commonly used by iron and steel enterprises to dry coke is to introduce hot waste gas into the blast furnace coke tank area through pipelines, and then lead branch pipes from this pipeline into each coke tank that needs to dry coke. The source of the hot exhaust gas can be the exhaust gas of the sintering machine or the exhaust gas of the hot blast stove. After drying, the moisture content of the coke can be reduced to less than 5%. However, during the process of drying coke, the hot exhaust gas will bring up a large amount of dust. If it is directly discharged into the atmosphere without treatment, it will pollute the environment. It will cause fouling and clogging of the filter bag of the dust collector, and reduce the dust removal effect.

Utility model content

The embodiment of the utility model relates to a blast furnace coke drying system, which can at least solve some defects of the prior art.

The embodiment of the utility model relates to a blast furnace coke drying system, which includes a drying mechanism, the drying mechanism includes a coke tank for accommodating coke, the coke tank is provided with a waste gas outlet and at least one hot waste gas inlet, and the waste gas The outlet is connected with a dust removal mechanism, and the dust removal mechanism includes a primary dust collector and a secondary dust collector, and the primary dust collector is a gravity dust collector or a cyclone dust collector.

As one of the embodiments, the secondary dust collector is a bag filter.

As one of the embodiments, the drying mechanism further includes a hot exhaust gas supply pipe, an induced draft fan is provided on the hot exhaust air supply pipe, one end of the hot exhaust air supply pipe communicates with the hot exhaust gas source, and the other end communicates with each of The exhaust gas inlet is connected.

As one of the embodiments, the coke trough is provided with a plurality of hot waste gas inlets, and each of the hot waste gas inlets is provided on the lower cone section of the coke trough; each of the hot waste gas inlets is connected to the The hot exhaust gas supply pipe communicates.

As one of the embodiments, each of the hot exhaust gas inlet rings is arranged on the lower cone section of the coke groove.

The embodiment of the utility model achieves at least the following beneficial effects: by using a gravity dust collector or a cyclone dust collector to perform coarse dust removal on the dried waste gas, the environment is protected, and the pressure of the subsequent fine dust removal process is reduced; At the same time, the dust particles in the exhaust gas are removed, and the moisture in the dried exhaust gas is removed to prevent the filter bag of the dust collector from fouling, clogging and reducing the dust removal effect in the subsequent fine dust removal process.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative work.

Fig. 1 is a schematic structural diagram of a blast furnace coke drying system provided by an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figure 1, the utility model embodiment provides a blast furnace coke drying system, including a drying mechanism, the drying mechanism includes a coke tank 4 for accommodating coke, and the coke tank 4 is provided with a waste gas outlet and at least one heat sink. The exhaust gas inlet and the exhaust gas outlet are connected with a dust removal mechanism, and the dust removal mechanism includes a primary dust collector 6 and a secondary dust collector, and the primary dust collector 6 is a gravity dust collector or a cyclone dust collector. Among them, the hot exhaust gas inlet is preferably provided with multiple, that is, increasing the channel for hot exhaust gas to enter the coke groove 4 can increase the dispersion area of the hot exhaust gas in the coke groove 4, so that the hot exhaust gas can diffuse more evenly in the coke groove 4, and improve the thermal exhaust gas flow rate. Heat exchange effect with coke. Each hot waste gas inlet is preferably arranged on the lower cone section of the coke tank 4, so as to increase the contact time between the hot waste gas and coke and improve the heat exchange effect. Further, each hot exhaust gas inlet ring is set on the lower cone section of the coke groove 4, that is, each hot exhaust gas inlet is located on the same horizontal section of the lower cone section, and is evenly arranged circularly along this section, which can improve the hot exhaust gas in the lower cone section. Dispersion homogeneity effect in the focal groove 4. The outlet of the hot exhaust gas is located on the top of the coke tank 4, and communicates with the inlet of the primary dust collector 6 through the air outlet pipe 5, and the outlet of the primary dust collector 6 communicates with the inlet of the secondary dust collector through the pipeline 7 of the fine dust removal system. After the hot waste gas is passed into the coke tank 4 to dry the coke, it is discharged from the coke tank 4 through the outlet of the hot waste gas, and enters the gravity dust collector or cyclone dust collector for rough dust removal. While removing part of the dust particles in the waste gas, the waste gas The moisture in the exhaust gas will also be removed by attaching to the dust particles; then the exhaust gas enters the secondary dust collector to further remove the dust particles in the exhaust gas. The secondary dust collector is preferably a bag filter for fine dust removal, and the exhaust gas can reach the emission standard after the secondary dust removal.

Continuing with the blast furnace coke drying system, the drying mechanism also includes a hot waste gas supply pipe 1, and an induced draft fan 2 is arranged on the hot waste gas supply pipe 1, and one end of the hot waste gas supply pipe 1 communicates with a hot waste gas source, and the other One end communicates with each of the hot exhaust gas inlets, wherein each hot exhaust gas inlet communicates with the hot exhaust gas supply pipe 1 through an air guide pipe 3 . In actual use, since there are multiple coke tanks 4, the coke in the multiple coke tanks 4 needs to be dried. Therefore, a hot waste gas supply pipe 1 can be arranged to introduce hot waste gas into each coke tank 4, that is, each coke tank 4 connected air guide pipes 3 are all communicated with the hot exhaust gas supply pipe 1; a plurality of hot exhaust gas supply pipes 1 can also be set, the number of hot exhaust gas supply pipes 1 is the same as the number of coke grooves 4 and they are arranged and connected in one-to-one correspondence. Each coke trough 4 is introduced into the hot waste gas by a hot waste gas supply pipe 1, and a flow regulating valve can be set on each hot waste gas supply pipe 1 to adjust the flow rate of the hot waste gas according to the coke content and moisture content in each coke trough 4 .

The embodiment of the utility model achieves at least the following beneficial effects: by using a gravity dust collector or a cyclone dust collector to perform coarse dust removal on the dried waste gas, the environment is protected, and the pressure of the subsequent fine dust removal process is reduced; At the same time, the dust particles in the exhaust gas are removed, and the moisture in the dried exhaust gas is removed to prevent the filter bag of the dust collector from fouling, clogging and reducing the dust removal effect in the subsequent fine dust removal process.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (5)

1. A blast furnace coke drying system, comprising a drying mechanism, the drying mechanism includes a coke tank for accommodating coke, and the coke tank is provided with a waste gas outlet and at least one hot waste gas inlet, characterized in that: the waste gas The outlet is connected with a dust removal mechanism, and the dust removal mechanism includes a primary dust collector and a secondary dust collector, and the primary dust collector is a gravity dust collector or a cyclone dust collector. 2. The blast furnace coke drying system according to claim 1, characterized in that: the secondary dust collector is a bag filter. 3. The blast furnace coke drying system according to claim 1, characterized in that: the drying mechanism also includes a hot waste gas supply pipe, an induced draft fan is arranged on the hot waste gas supply pipe, and one end of the hot waste gas supply pipe It communicates with the hot exhaust gas source, and the other end communicates with each of the hot exhaust gas inlets. 4. The blast furnace coke drying system according to claim 3, characterized in that: the coke tank is provided with a plurality of hot waste gas inlets, and each of the hot waste gas inlets is arranged on the lower cone section of the coke tank; Each of the hot exhaust gas inlets communicates with the hot exhaust gas supply pipe through an air duct. 5. The blast furnace coke drying system according to claim 4, characterized in that: each of the hot waste gas inlet rings is arranged on the lower cone section of the coke tank.