CN203886319U - Multifunctional smoke tar filter and filtering system - Google Patents

Abstract

The utility model provides a multifunctional flue gas tar filter, comprising: a filter core, a filter housing, a flange, an internal heat exchange tube, and an external heat exchange tube; Blue, the filter core is filled in the filter shell; the internal heat exchange tubes are evenly distributed in the filter core; the external heat exchange tubes are evenly arranged on the surface of the filter shell, and one end of the external heat exchange tube is connected to the internal heat exchange tube , and the other end is the heat output interface. The utility model also provides a corresponding system. The utility model not only purifies flue gas, but also realizes the purposes of comprehensive utilization of resources, energy saving and consumption reduction, and clean production.

Description

Multifunctional flue gas tar filter and filtration system

technical field

The utility model relates to the fields of flue gas purification in smelting, chemical industry and environmental protection, in particular to a multifunctional flue gas tar filter and a filtering system.

Background technique

Sintering production is an indispensable process for blast furnace smelting. This process provides stable and reliable sinter for blast furnace smelting and is a strong guarantee for the iron and steel industry. At present, the sintering production capacity has been greatly improved with the upgrading of technology and equipment transformation, and the sintering area is also continuously expanding, and the sintering flue gas generated along with the sintering production has also increased dramatically. The characteristics of sintering flue gas are:

1) The amount of smoke is large. About 1500-3000m ³ flue gas is produced for every ton of sinter produced.

2) The flue gas temperature is higher. With the fluctuation of process operation conditions, the flue gas temperature generally changes in the range of 120-150 °C.

3) The flue gas carries a lot of dust.

4) Large moisture content and high dew point.

5) Contains more SO ₂ , NOx, tar, carbon dioxide (CO ₂ ) and dioxins, etc.

At present, some sintering plants have installed dust removal and desulfurization equipment, and the pollution of SO ₂ and dust has been suppressed. Among them, tar will form a liquid with high viscosity and fine particles due to its own physical properties and easy combination and reaction with other substances, such as dust and water. This liquid is easy to corrode pipes, stick and damage bearings and valves, reduce heat transfer efficiency of heat exchanger, etc. It is difficult to be burned and utilized together with combustible gas at low temperature, and most of it is wasted. In short, if the flue gas is directly applied to the off-the-shelf power plant dust removal and desulfurization technology without removing tar, it will cause equipment blockage, reduce the treatment effect, and increase the frequency of equipment renewal, greatly increasing the cost. In addition, the gas containing tar has great damage to the human body.

Utility model content

The utility model aims at the above-mentioned problems of sintering flue gas purification, and provides a multifunctional sintering flue gas tar filter, which can not only effectively remove or recycle tar, but also remove part of particles. The multi-functional sintering flue gas tar filter of the utility model not only turns waste into treasure, but also provides a strong guarantee for the normal and efficient operation of the follow-up equipment for flue gas purification in the sintering plant.

A multifunctional smoke tar filter provided according to the utility model includes: a filter core, a filter housing, a flange, an internal heat exchange tube, and an external heat exchange tube;

Both ends of the filter housing are provided with flanges, and the filter core is filled in the filter housing;

The internal heat exchange tubes are evenly distributed in the filter core;

The external heat exchange tubes are evenly arranged on the surface of the filter shell, one end of the external heat exchange tube is connected with the internal heat exchange tube, and the other end is a heat output interface.

Preferably, the inner heat exchange tubes are distributed in a spiral and ascending shape along the inner wall of the filter core; the outer heat exchange pipes are distributed in a spiral and ascending shape along the surface of the filter housing.

Preferably, an included angle is formed between the extension direction of the inner heat exchange tube and the length direction of the filter core, and the included angle is 90°, 45°, 30° or 0°.

Preferably, a movable door is provided on the bottom or side of the filter housing.

According to a kind of multifunctional flue gas tar filtering system provided by the present invention, comprise above-mentioned multifunctional flue gas tar filter, main flue, bypass, main flue valve, bypass valve, intake pipe, exhaust pipe, also Including sintering machine, flue gas purification equipment;

The main flue and the bypass are respectively connected between the intake pipe and the exhaust pipe; the main flue valve and the multi-functional flue gas tar filter are sequentially arranged in the main flue along the air intake direction, and the bypass is arranged along the air intake direction A bypass valve and the multifunctional flue gas tar filter are provided in sequence; the waste gas output port of the sintering machine is connected to the inlet of the intake pipe, and the outlet of the exhaust pipe is connected to the waste gas receiving port of the dust removal and desulfurization purification equipment.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model not only turns tar into treasure, but also provides a strong guarantee for the normal and efficient operation of the follow-up equipment for flue gas purification in the sintering plant. It is installed after the sintering machine and before other flue gas purification equipment, which can not only remove the tar in the flue gas, but also remove part of the dust. The filtered tar can be further processed to become a high-quality chemical raw material or industrial fuel, or it can be used as a raw material or fuel for sintering production together with the filter material without treatment. The multifunctional sintered flue gas tar filter is easy to process, easy to obtain raw materials, high in quality and low in price, convenient to connect with pipelines, and simple to unload or fill. In addition, the multifunctional sintered flue gas tar filter can be freely connected to the pipeline, which can be horizontal or vertical. Its shape can be changed according to the needs of the actual pipeline. Moreover, intermittent operation can be realized, and online continuous operation can also be realized. The multifunctional smoke tar filter of the utility model not only purifies the smoke, but also realizes the purposes of resource comprehensive utilization, energy saving and consumption reduction, and clean production.

Description of drawings

Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

Fig. 1 is the overall structure schematic diagram of multi-functional flue gas tar filter;

Fig. 2 is a schematic diagram of the installation position of the multifunctional flue gas tar filter;

Fig. 3 is a structural schematic diagram of a (cuboid) multifunctional smoke tar filter;

Fig. 4 is a structural schematic diagram of a cylindrical multifunctional flue gas tar filter;

Figure 5 is a front view of the horizontal installation of the multifunctional smoke tar filter;

Fig. 6 is a vertically installed front view of the multifunctional smoke tar filter.

In the picture:

1 is the internal heat exchange sleeve;

2 is the flange;

3 is an external heat exchange sleeve;

4 is screw hole;

5 is a multifunctional smoke tar filter;

6 Main flue valve;

7 is a bypass valve;

8 is a sintering machine;

9 main flue;

10 is bypass.

Detailed ways

The utility model is described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present utility model. These all belong to the protection domain of the present utility model.

According to the multifunctional flue gas tar filter and filtering system provided by the utility model, comprising the multifunctional flue gas tar filter, main flue, bypass, main flue valve, bypass valve, intake pipe, exhaust pipe , including sintering machines, flue gas purification equipment (such as dust removal and desulfurization purification equipment). The main flue and the bypass are respectively connected between the intake pipe and the exhaust pipe; the main flue valve and the multi-functional flue gas tar filter are sequentially arranged in the main flue along the air intake direction, and the bypass is arranged along the air intake direction A bypass valve and the multifunctional flue gas tar filter are provided in sequence; the waste gas output port of the sintering machine is connected to the inlet of the intake pipe, and the outlet of the exhaust pipe is connected to the waste gas receiving port of the dust removal and desulfurization purification equipment.

As shown in Figure 2, the installation position of the multifunctional flue gas tar filter in the flue gas pipeline (main flue, bypass) is located after the sintering machine and before other flue gas purification equipment, so The multifunctional flue gas tar filter can remove or recover flue gas tar, play a role in pretreatment of flue gas, and provide a strong guarantee for the normal and efficient operation of subsequent flue gas purification equipment. The obtained tar can be used as a high-quality industrial fuel and chemical raw material after purification, and can also be directly used as raw material or fuel for sintering production. Further, a bypass is set in the flue gas pipeline to realize intermittent removal or recovery of tar and online continuous removal or recovery of tar. And the bypass diameter is larger than the main flue, and the decoking efficiency is higher.

More specifically, the schematic diagram of the multi-functional flue gas tar filter provided by the utility model is shown in FIG. 1 . The multi-functional flue gas tar filter can not only realize flue gas purification, but also can recover tar, and can also remove part of the smoke and dust. In addition, it can also provide fuel or raw materials for sintering production. The multifunctional flue gas tar filter includes: a filter core, a filter housing, a flange, an internal heat exchange tube, and an external heat exchange tube. Both ends of the filter housing are provided with flanges, and the filter core is filled in the filter housing.

The internal heat exchange tubes are evenly distributed in the filter core, and the number is determined according to the diameter of the flue gas pipe. The angle between the internal heat exchange tubes and the flue gas can be adjusted, for example, it can be 90°, 45°, 30°, 0°, etc. The external heat exchange tubes are evenly arranged on the surface of the filter shell. One end of the external heat exchange tubes is connected to the internal heat exchange tubes, and the other end is connected to units that require heat energy, such as raw material preheating units, exhaust gas emission heating units, etc. The function of the inner and outer heat exchange tubes is to reduce the temperature of the flue gas passing through the filter to cool the tar and further improve its removal efficiency; the second is to provide heat for other heat-requiring units. The inner and outer heat exchange tubes store and transfer the heat of the flue gas to the flue gas before entering the chimney, so that the height of the flue gas discharged by the chimney reaches the relevant regulations.

More specifically, the multi-functional flue gas tar filter is connected to the pipeline through a flange; according to the shape of the pipeline, the filter housing can be a (cuboid) as shown in Figure 3 or as shown in Figure 4 The cylinder shown in the figure can be installed horizontally as shown in Figure 5 or vertically as shown in Figure 6. The material of the filter housing can be made of stainless steel, composite material and other materials. The filter element consists of coke as an internal filler. There is a movable door on the bottom or side of the filter housing to facilitate unloading or filling.

The specific embodiments of the present utility model have been described above. It should be understood that the utility model is not limited to the above-mentioned specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the utility model.

Claims (5)

1. A multifunctional flue gas tar filter, comprising: a filter core, a filter housing, a flange, an internal heat exchange tube, and an external heat exchange tube; Both ends of the filter housing are provided with flanges, and the filter core is filled in the filter housing; The internal heat exchange tubes are evenly distributed in the filter core; The external heat exchange tubes are evenly arranged on the surface of the filter shell, one end of the external heat exchange tube is connected with the internal heat exchange tube, and the other end is a heat output interface. 2. The multifunctional flue gas tar filter according to claim 1, characterized in that, the internal heat exchange tubes are spirally distributed along the inner wall of the filter core; the external heat exchange tubes are arranged along the surface of the filter housing. Spiral distribution. 3. The multifunctional flue gas tar filter according to claim 1, wherein an included angle is formed between the extension direction of the internal heat exchange tube and the length direction of the filter core, and the included angle is 90°, 45° °, 30° or 0°. 4. The multifunctional flue gas tar filter according to claim 1, characterized in that a movable door is provided on the bottom or side of the filter housing. 5. A multifunctional flue gas tar filter system, characterized in that it comprises the multifunctional flue gas tar filter described in any one of claims 1 to 4, a main flue, a bypass, a main flue valve, a bypass Road valves, intake pipes, exhaust pipes, sintering machines, flue gas purification equipment; The main flue and the bypass are respectively connected between the intake pipe and the exhaust pipe; the main flue valve and the multi-functional flue gas tar filter are sequentially arranged in the main flue along the air intake direction, and the bypass is arranged along the air intake direction A bypass valve and the multifunctional flue gas tar filter are provided in sequence; the waste gas output port of the sintering machine is connected to the inlet of the intake pipe, and the outlet of the exhaust pipe is connected to the waste gas receiving port of the dust removal and desulfurization purification equipment.