阅读说明：本技术 一种冶铁装置及其烧结设备 (Iron smelting device and sintering equipment thereof ) 是由 章开颜 刘再新 刘贵云 黄睿 徐玉珍 于 2019-09-10 设计创作，主要内容包括：本发明公开了一种冶铁装置及其烧结设备,包括生石灰消化设备和除尘装置,其还包括：用于混合所述生石灰消化设备的含尘气体和热风管路的热风的混流装置,所述混流装置包括用于与所述生石灰消化设备的排气口连通的第一进口,用于与所述热风管路连通的第二进口,用于与所述除尘装置相连的出口。由于热风的温度高,含尘气体进入混流装置后会提高含尘气体的温度,使含尘气体保持在饱和温度以上,再进入除尘装置,从而保证含尘气体在流动过程中管道和除尘装置中不会出现冷凝现象,维持含尘气体干燥状态,避免粉尘的板结,保证整个设备长期稳定的正常运行。(The invention discloses an iron smelting device and sintering equipment thereof, which comprise quicklime slaking equipment and a dust removing device, and further comprise: the mixed flow device is used for mixing the dusty gas of the quicklime slaking equipment and the hot air of the hot air pipeline, and comprises a first inlet, a second inlet and an outlet, wherein the first inlet is used for being communicated with an exhaust port of the quicklime slaking equipment, the second inlet is used for being communicated with the hot air pipeline, and the second inlet is used for being connected with the dust removal device. Because hot-blast temperature is high, can improve dirty gaseous temperature behind the dirty gas entering mixed flow device, make dirty gas keep above the saturation temperature, reentry dust collector to guarantee that dirty gas can not appear the condensation phenomenon in pipeline and the dust collector in the flow process, maintain dirty gaseous drying state, avoid the hardening of dust, guarantee the long-term stable normal operating of whole equipment.)

1. The sintering equipment comprises quicklime slaking equipment and a dust removal device (9), and is characterized by further comprising:

The mixed flow device (8) is used for mixing the dust-containing gas of the quicklime slaking equipment and the hot air of the hot air pipeline, and the mixed flow device (8) comprises a first inlet (A1) used for being communicated with an exhaust port of the quicklime slaking equipment, a second inlet (A2) used for being communicated with the hot air pipeline, and an outlet (A3) connected with the dust removal device (9).

2. Sintering plant according to claim 1, characterized in that the flow mixing device (8) comprises:

A first straight barrel section (2) having said first inlet (A1);

A second cylindrical section (3) having the second inlet (A2) and the outlet (A3), the first cylindrical section (2) and the second cylindrical section (3) being connected, and the diameter of the second cylindrical section (3) being larger than the diameter of the first cylindrical section (2), the position of the second cylindrical section (3) being higher than the position of the first cylindrical section (2).

3. Sintering apparatus according to claim 2, characterized in that at the first inlet (a1) and/or the second inlet (a2) a resistance regulating valve is provided for equating the pressure at the first inlet (a1) with the pressure at the second inlet (a 2).

4. sintering equipment according to claim 2 characterized in that the direction of the axis of said second inlet (A2) is parallel to the tangential direction of the involute of said second straight cylinder segment (3).

5. The sintering apparatus according to claim 2, characterized in that the end of the flow mixing device (8) away from the first inlet (A1) has an atmospheric air bypass port (A4), and the atmospheric air bypass port (A4) communicates with the end of the second straight cylinder section (3) away from the first straight cylinder section (2) through a bypass valve (4).

6. The sintering equipment as claimed in claim 1, further comprising a quicklime bin for storing quicklime;

and a conveying device is arranged at an outlet of the quicklime bin, and the tail end of the conveying device is opposite to a feeding hole of the quicklime slaking equipment.

7. sintering equipment according to claim 1, characterized in that a dust hood (7) is arranged at the exhaust port, and the outlet of the dust hood (7) is connected with the first inlet (A1).

8. an iron smelting plant comprising a sintering apparatus, characterized in that the sintering apparatus is a sintering apparatus according to any one of claims 1-7.

Technical Field

the invention relates to the technical field of smelting, in particular to an iron smelting device and sintering equipment thereof.

Background

In the raw material proportioning stage, the sintering generally adopts a quicklime slaking process, namely, in the raw material proportioning stage, quicklime, namely calcium oxide (CaO), is generally added, and then water is added, so that the calcium oxide and the water generate a chemical reaction to generate calcium hydroxide. A large amount of heat is released during the chemical reaction, so that the process can strengthen the sintering process, improve the material temperature and reduce the over-wet phenomenon in the sintering process; the surface of the produced slaked lime is in a colloid state, has strong water absorption and large cohesive force, and can improve the balling property of the sintering mixture.

Although the process performance of the quicklime digestion process is improved, the process also produces serious environmental pollution, a large amount of water vapor can be produced by the heat produced by the quicklime digestion, and the water vapor can carry a large amount of dust while diffusing outwards, so that the surrounding environment is polluted; the main substances of dust here are: CaO, Ca (OH)2, CaCO3, and iron-containing dust characterized by: high humidity, high concentration, light dust and fine particles. This part dirty gas is the saturation state, and after the access dust pelletizing system, also can bring a large amount of ambient air simultaneously, because of the interfusion of ambient air and the cooling in the dust removal pipeline will make dirty gas temperature reduce. Part of water vapor is condensed into water in the pipeline, the mixture of the water and the dust is in a colloid state, the cohesive force is large, the dust removal pipeline is easily blocked, the adhesion to dust removal equipment is caused, the blockage of the pipeline influences the dust removal capacity of the system, the adhesion to the equipment influences the dust removal efficiency, the operation of the whole dust removal system is abnormal, and the whole system can be paralyzed in a short time in serious cases. The paralysis of the system can cause pollution to the surrounding environment, the surrounding area is completely white lime dust, the lime dust is diffused in the air, and strong stimulation is caused to the respiratory tract of people, so that the harm caused by the high-humidity high-concentration lime dust needs to be solved.

At present, the dust removal at the quicklime digestion part is selected from the following anti-blocking and dust removal equipment in a dust removal pipeline:

Dust removal pipeline anti-blocking

In order to prevent the pipeline from being blocked, a mode of spraying water along the way from a dust removing point to an inlet pipeline of dust removing equipment is mainly adopted at present, so that the blockage of the pipeline is relieved, but the mode has the main defects of high water consumption, incapability of completely avoiding the blockage of the pipeline and need of regularly cleaning sediments at a low point or an elbow of the pipeline.

Dust removing equipment

The selection of the existing dust removing equipment is mainly a wet dust remover or a combination of the wet dust remover and the wet electric dust remover. The dust removal efficiency of the wet dust collector is only 97 percent at most if the emission of 20mg/m is satisfied³The concentration requirement of the inlet of the dust remover cannot be higher than 670mg/m³The actual inlet concentration of the dust collector is generally 8-15 g/m³Far above this value, the emission requirements cannot be guaranteed by single-pole wet dust removal, and a two-stage wet dust collector or a series connection of a wet dust collector and a wet electric dust collector is required to guarantee the emission requirements of dust removal.

The existing dust removal technical schemes all belong to wet dust removal, a large amount of sewage is generated during system operation, and the sewage cannot be discharged outwards according to the environmental protection requirement, so the generated sewage is generally conveyed to a mixer by a sewage pump, and if the water quantity balance of the process cannot be ensured, the part of sewage is likely to generate secondary pollution.

therefore, the technical problem to be solved by those skilled in the art is how to provide a flow mixing device of a sintering device to alleviate the pollution of lime dust.

Disclosure of Invention

in view of the above, the present invention is directed to a sintering apparatus to alleviate the pollution of lime dust. Another object of the present invention is to provide an iron smelting device with the sintering equipment.

In order to achieve the purpose, the invention provides the following technical scheme:

A sintering equipment comprises quicklime slaking equipment and a dust removal device, and further comprises:

The mixed flow device is used for mixing the dusty gas of the quicklime slaking equipment and the hot air of the hot air pipeline, and comprises a first inlet, a second inlet and an outlet, wherein the first inlet is used for being communicated with an exhaust port of the quicklime slaking equipment, the second inlet is used for being communicated with the hot air pipeline, and the second inlet is used for being connected with the dust removal device.

Preferably, in the sintering apparatus described above, the flow mixing device includes:

A first straight section having the first inlet;

A second straight cylinder section having the second inlet and the outlet, the first straight cylinder section and the second straight cylinder section being connected, and the diameter of the second straight cylinder section being larger than that of the first straight cylinder section, the position of the second straight cylinder section being higher than that of the first straight cylinder section.

Preferably, in the sintering apparatus described above, a resistance adjustment valve for matching a pressure at the first inlet with a pressure at the second inlet is provided at the first inlet and/or the second inlet.

Preferably, in the sintering apparatus, an axial direction of the second inlet is parallel to a tangential direction of an involute of the second straight cylinder section.

Preferably, in the sintering apparatus, an atmosphere bypass port is provided at an end of the flow mixing device away from the first inlet, and the atmosphere bypass port is communicated with an end of the second straight cylinder section away from the first straight cylinder section through a bypass valve.

Preferably, the sintering equipment further comprises a quicklime bin for storing quicklime;

and a conveying device is arranged at an outlet of the quicklime bin, and the tail end of the conveying device is opposite to a feeding hole of the quicklime slaking equipment.

Preferably, in the sintering apparatus, a dust hood is disposed at the exhaust port, and an outlet of the dust hood is connected to the first inlet.

An iron smelting device comprises sintering equipment, wherein the sintering equipment is any one of the sintering equipment.

According to the technical scheme, the temperature of the hot air is high, so that the temperature of the dust-containing gas can be increased after the dust-containing gas enters the flow mixing device, the dust-containing gas is kept above the saturation temperature, and then the dust-containing gas enters the dust removal device, so that the dust-containing gas is prevented from condensing in a pipeline and the dust removal device in the flowing process, the dry state of the dust-containing gas is maintained, the dust is prevented from being hardened, and the long-term stable normal operation of the whole device is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a front view of a flow mixing device disclosed in an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the flow mixing device disclosed in an embodiment of the present invention;

FIG. 3 is a top view of the flow mixing device disclosed in an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a sintering apparatus disclosed in an embodiment of the present invention.

Detailed Description

In view of the above, the core of the present invention is to disclose a sintering apparatus to alleviate the pollution of lime dust. The other core of the invention is to disclose an iron smelting device with the sintering equipment.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 4, the present invention discloses a sintering apparatus comprising: the device comprises quicklime slaking equipment, dust removing equipment 9 and a mixed flow device 8, wherein the quicklime slaking equipment is a structure for slaking quicklime, and the dust removing equipment 9 is used for treating dust generated by the quicklime so as to ensure that the discharged gas meets the discharge standard and reduce pollution. Because the temperature can reduce and take place the condensation phenomenon after the dust-laden gas that quick lime slaking equipment discharged passes through the pipeline and arrives dust collector, in view of this, mixed flow device 8 has been increased in this application. Specifically, the flow mixing device 8 is used for mixing dust-containing gas of quicklime slaking equipment and hot air of a hot air pipeline, namely, the dust-containing gas at an exhaust port enters the dust removal device 9 after passing through the flow mixing device 8. This mixed flow device 8 includes: a first inlet A1 used for being communicated with the exhaust port of the quicklime slaking equipment, a second inlet A2 used for being communicated with the hot air pipeline, and an outlet A3 used for being connected with the dust removing device 9.

Because hot-blast temperature is high, can improve dirty gaseous temperature behind the dirty gas entering mixed flow device 8, make dirty gas keep above the saturation temperature, reentrant dust collector 9 to guarantee that dirty gas can not appear the condensation phenomenon in pipeline and dust collector 9 in the flow process, maintain dirty gas drying state, avoid the hardening of dust, guarantee the long-term stable normal operating of whole equipment.

In a specific embodiment, the flow mixing device 8 in the present application comprises a first straight cylinder section 2 and a second straight cylinder section 3, wherein the first straight cylinder section 2 has a first inlet a1, the second straight cylinder section 3 has a second inlet a2 and an outlet A3, the diameter of the second straight cylinder section 3 is larger than that of the first straight cylinder section 2, and the position of the second straight cylinder section 3 is higher than that of the first straight cylinder section 2. That is, the flow mixing device 8 in this application is a cylinder with different diameters. The diameter of the second straight cylinder section 3 is larger than that of the first straight cylinder section 2, so that the mixing space is ensured, and the mixing effect is ensured. Only one specific shape of the flow mixing device 8 is disclosed, and in practice, the flow mixing device 8 can be modified according to different requirements and is within the protection range. As can be understood by those skilled in the art, the core of the flow mixing device 8 is to mix and discharge two gases, so that the device with a three-way pipe structure is in a protection range.

In practice, since the distance from the hot air introduction point to the second inlet a2 is far greater than the distance from the dust removal port to the first inlet a1, that is, the interface resistance of the second inlet a2 is far greater than the interface resistance of the first inlet a1, the air volume of the first inlet a1 is higher than that of the second inlet a 2. In order to solve the problem that the air volume is increased to the end with low interface resistance caused by different interface resistances, the end with low interface resistance needs to be adjusted. Specifically, a resistance-regulating valve may be provided at the first inlet a1 and/or the second inlet a 2. A regulator valve 1 may be required at the first inlet a1 to increase resistance, and a booster fan may be provided at the second inlet a 2. As can be understood by those skilled in the art, the core here is to ensure that the actual air volume of the dust-containing gas and the hot air is approximately the same as the designed air volume, and therefore, the structures for achieving the above purpose on the basis of the actual air volume are all within the protection range. Through the arrangement, the dust-containing gas with certain air quantity, temperature and humidity and the hot air with the corresponding quantity can be mixed and tempered, and the temperature of the mixed gas is required to be kept above the saturation temperature finally. In view of this, the mode and value of resistance adjustment need to be set according to the air volume and temperature of the dust-containing gas, and are all within the protection range.

In a preferred embodiment, the axial direction of the second inlet a2 is parallel to the tangential direction of the involute of the second straight cylinder section 3. As can be seen from the foregoing description, the position of the second inlet A2 is higher than the position of the first inlet A1, so that the hot air flows in the tangential direction of the involute during the circulation of the dust-containing gas, thereby ensuring the turbulent flow of the gas flow and the treatment effect. After entering the interior of the flow mixing device 8 through the first inlet A1, the dusty gas contacts with the hot air and completes the mixing in the mixing section 6 at the end of the flow mixing device 8 far away from the first inlet. And the outlet a3 is the mouth of the gas outlet line 5 communicating with the interior of the flow mixing device.

In the preferred embodiment, the end of the flow mixing device 8 away from the first inlet A1 is provided with an atmosphere bypass port A4, and the atmosphere bypass port A1 is communicated with the end of the second straight cylinder section 3 away from the first straight cylinder section 2 through a bypass valve 4. The flow mixing device 8 is provided with an atmosphere bypass port A4, a bypass valve 4 is arranged at the position of the atmosphere bypass port A4, when a dust removal system breaks down (a dust removal fan is stopped, hot air is failed to be introduced, and the like), the bypass valve 4 can be opened, dust-containing gas is temporarily discharged into the atmosphere through the atmosphere bypass port A4, and the dust-containing gas which is not mixed with the hot air is prevented from entering a dust removal pipeline to block the system. System failure can be addressed by adding the atmospheric bypass port a4 and the bypass valve 4.

In a further embodiment, the sintering equipment further comprises a quicklime bin for storing quicklime, a conveying device is arranged at an outlet of the quicklime bin, and the tail end of the conveying device is opposite to a feeding hole of the quicklime slaking equipment. The material supply device of the quicklime slaking device can adopt other feeding modes in practice and is in a protection range.

The exhaust port in this application is provided with dust excluding hood 7 to the outlet of dust excluding hood 7 links to each other with first import A1. The dust hood is arranged at the exhaust port of the quicklime slaking equipment, so that leaked gas can be treated, and the environmental pollution is further reduced.

In addition, this application has still disclosed a smelt iron device, including sintering equipment, wherein, this sintering equipment is the sintering equipment disclosed in the above-mentioned embodiment, therefore, smelt iron device that has this sintering equipment also has above-mentioned all technological effects, no longer describe herein one by one.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.