Filtering and dust removing device for outlet of slag cooler of boiler

Abstract

The utility model discloses a filtering and dust removing device for an outlet of a slag cooler of a boiler, which comprises a discharging pipe (1), a feeding end of the discharging pipe (1) is connected with the outlet (2) of the slag cooler, a discharging end of the discharging pipe (1) inclines downwards, a pipeline (3) is arranged on the outer side of the discharging pipe (1), one end of the pipeline (3) is connected with the discharging pipe (1), and the other end of the pipeline (3) is connected with a smoke punch (4) of the boiler. The joint of the pipeline (3) and the discharge pipe (1) is positioned on the upper side wall of the inclined part of the discharge pipe (1), and a filter (5) is arranged on the pipeline (3); a trumpet-shaped collecting cover (6) is arranged at the lower end of the discharging pipe (1); and an air curtain mechanism is arranged below the collecting cover (6). The utility model has the advantages of longer service life, lower equipment cost, lower use cost, lower noise and no pollution to workshop environment.

Description

Technical Field

[0001] The utility model belongs to the field of boiler slag cooler dust removal equipment, in particular to a filtering dust removal device for a boiler slag cooler outlet. Background Art

[0002] In a thermal power plant, the slag after boiler combustion is extremely hot and needs to be cooled in a slag cooler first. After the cooling treatment, the temperature of the slag is kept below 100°C before it can be discharged for easy transportation.

[0003] The outlet of the existing slag cooler is set horizontally, and the slag coming out contains some dust, which is easy to be raised during the slag discharge process, causing pollution to the workshop. Therefore, dust removal equipment needs to be installed at the outlet. The existing dust removal equipment includes a collection hood located above the outlet, which is connected to a bag filter through a pipeline, and an induced draft fan is installed on the filter.

[0004] The dust removal equipment has the following defects: First, because the temperature of the slag is still high, the temperature of the air flow passing through the induced draft fan is high, and the induced draft fan itself also generates heat. The combined effect of the two makes the induced draft fan easy to burn out and has a short service life. Second, when the pipeline is short, the induced draft fan cannot be set outside the workshop. The airflow discharged by the induced draft fan forms a large-scale beam in the workshop, polluting the workshop environment. If the induced draft fan is set outside the workshop, the pipeline needs to be longer, the equipment cost is higher, and the air flow resistance increases. In particular, the pipeline needs to be bent many times during the extension process to avoid other equipment that already exists on the path. Further increase in air flow resistance requires a corresponding increase in the power of the induced draft fan. The use cost of the equipment is high and the noise is also high. Utility Model Content

[0005] The purpose of the utility model is to provide a filtering dust removal device for a boiler slag cooler outlet. The utility model has the advantages of long service life, low equipment cost, low use cost, low noise and no pollution to the workshop environment.

[0006] The technical solution of the utility model is as follows: a filtering dust removal device for a boiler slag cooler outlet comprises a discharge pipe, a feed end of the discharge pipe is connected to the outlet of the slag cooler, the discharge end of the discharge pipe is inclined downward, a pipeline is provided on the outside of the discharge pipe, one end of the pipeline is connected to the discharge pipe, and the other end of the pipeline is connected to the smoke of the boiler, the connection between the pipeline and the discharge pipe is located on the upper side wall of the inclined part of the discharge pipe, and a filter is provided on the pipeline.

[0007] In the aforementioned filtering and dust removal device for the boiler slag cooler outlet, a trumpet-shaped collecting cover is provided at the lower end of the discharge pipe.

[0008] In the aforementioned filtering and dust removal device for the boiler slag cooler outlet, an air curtain mechanism is provided below the collecting hood, and the air curtain mechanism includes an annular hard pipe, which is connected to the blower through a hose, and a plurality of air nozzles evenly distributed circumferentially are provided on the top of the hard pipe.

[0009] In the aforementioned filtering and dust removal device for the boiler slag cooler outlet, the air nozzle is a fan-shaped nozzle.

[0010] In the aforementioned filtering and dust removal device for the boiler slag cooler outlet, the air inlet end of the air nozzle is provided with a rotating tube sleeved on the hard tube, both ends of the rotating tube are provided with sealing rings, and the inner side of the rotating tube is provided with an air hole passing through the hard tube.

[0011] Compared with the prior art, the utility model sets an inclined discharge pipe at the outlet of the slag cooler, sets a pipe connected to the smoke blast on the discharge pipe, and uses the suction effect of the smoke blast to replace the induced draft fan in the existing dust removal equipment to form an airflow, so as to extract the dust in the slag. At the same time, the slag will roll and scatter when falling in the discharge pipe, so that the dust cleaning is more thorough and the dust removal effect is better. The utility model cleverly uses the smoke blast as the driving source of the dust removal power, and does not need to set up an induced draft fan. It obviously has a longer service life, lower equipment cost, lower use cost and less noise. Moreover, the smoke blast must be near the outlet of the slag cooler, and the required pipeline length is also relatively short, which also makes the equipment cost lower. The airflow formed during dust removal enters the smoke blast and is discharged outside the workshop, and will not pollute the workshop environment. In summary, the utility model has the advantages of longer service life, lower equipment cost, lower use cost, less noise and will not pollute the workshop environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 It is a top view schematic diagram of the rigid pipe.

[0014] Figure 3 It is a connection diagram of rigid pipe and rotary pipe.

[0015] The markings in the attached drawings are: 1-discharging pipe, 2-export, 3-pipeline, 4-smoke flushing, 5-filter, 6-collecting hood, 7-hard tube, 8-hose, 9-blower, 10-air nozzle, 11-rotating tube, 12-sealing ring, 13-air hole. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0017] Example 1. A filtering and dust removal device for a boiler slag cooler outlet, such as Figure 1As shown, it includes a discharge pipe 1, the feed end of the discharge pipe 1 is connected to the outlet 2 of the slag cooler, the discharge end of the discharge pipe 1 is tilted downward, and the tilt angle is 30-60°. A pipe 3 is provided on the outside of the discharge pipe 1, one end of the pipe 3 is connected to the discharge pipe 1, and the other end of the pipe 3 is connected to the flue gas 4 of the boiler. The connection between the pipe 3 and the discharge pipe 1 is located on the upper side wall of the inclined part of the discharge pipe 1 to prevent the slag from blocking the pipe 3. A filter 5 is provided on the pipe 3. A trumpet-shaped collecting cover 6 is provided at the lower end of the discharge pipe 1.

[0018] Working principle: Under the smoke flushing effect, the internal pressure of smoke flush 4 is negative. The boiler in the thermal power plant has a large combustion volume, and the smoke exhaust speed of smoke flush 4 is fast. The height of smoke flush 4 in the thermal power plant is large, and the smoke flushing effect is significant, resulting in a high negative pressure value inside smoke flush 4, forming a significant suction effect, forming airflow, and the airflow passes through the collection hood 6 and the pipeline 3 in sequence into the smoke flush 4. The slag discharged from the outlet 2 is discharged through the pipeline 3. The slag has a rolling and falling tendency in the inclined pipeline. During the rolling process, it is fully impacted by the airflow. The dust enters the pipeline 3 with the airflow and is intercepted in the filter 5.

[0019] Embodiment 2. On the basis of embodiment 1, an air curtain mechanism is provided below the collection hood 6, and the air curtain mechanism comprises an annular hard tube 7, the hard tube 7 is connected to the ground or the collection hood 6 through a bracket, the hard tube 7 is connected to the blower 9 through a hose 8, and a plurality of circumferentially evenly distributed air nozzles 10 are provided on the top of the hard tube 7, and the air nozzles 10 are fan-shaped nozzles.

[0020] The air inlet end of the air nozzle 10 is provided with a rotating tube 11 sleeved on the hard tube 7 , both ends of the rotating tube 11 are provided with sealing rings 12 , and the inner side of the rotating tube 11 is provided with an air hole 13 passing through the hard tube 7 .

[0021] The blower 9 generates airflow, which enters the hard tube 7 through the hose 8, enters the air nozzle 10 through multiple air holes 13, and is ejected to form a conical wind curtain, which intercepts residual dust, prevents dust from overflowing, and ensures that dust enters the pipeline 3. The injection direction of the air nozzle 10 should be kept inside the edge of the collection hood 6, and the injection direction of the air nozzle 10 is variable to adapt to different distances between the air nozzle 10 and the collection hood 6. The blower 9 is connected to the hard tube 7 through the hose 8, so that the location where the blower 9 can be placed has a large choice and avoids obstacles.

[0022] Compared with the induced draft fan in the prior art, the induced draft fan is affected by the filter, has a large air flow resistance, and requires high power. The blower 9 in Example 2 is used to form an air curtain, the air flow does not pass through the filter, the air flow resistance is small, the required power of the blower 9 is small, and the equipment cost and use cost of the blower are relatively low.

Claims

1. A filtering and dust removal device for the outlet of a boiler slag cooler, characterized in that: The invention comprises a discharge pipe (1), wherein the feed end of the discharge pipe (1) is connected to the outlet (2) of the slag cooler, the discharge end of the discharge pipe (1) is inclined downward, a pipe (3) is provided on the outside of the discharge pipe (1), one end of the pipe (3) is connected to the discharge pipe (1), and the other end of the pipe (3) is connected to the smoke exhaust (4) of the boiler, the connection between the pipe (3) and the discharge pipe (1) is located on the upper side wall of the inclined part of the discharge pipe (1), and a filter (5) is provided on the pipe (3).

2. The filtering and dust removal device for the boiler slag cooler outlet according to claim 1 is characterized in that: A trumpet-shaped collecting cover (6) is provided at the lower end of the discharge pipe (1).

3. The filtering and dust removal device for the boiler slag cooler outlet according to claim 2 is characterized in that: An air curtain mechanism is provided below the collecting hood (6), the air curtain mechanism comprising an annular hard tube (7), the hard tube (7) being connected to a blower (9) via a hose (8), and a plurality of air nozzles (10) uniformly distributed in the circumferential direction are provided on the top of the hard tube (7).

4. The filtering and dust removal device for the boiler slag cooler outlet according to claim 3 is characterized in that: The air nozzle (10) is a fan-shaped nozzle.

5. The filtering and dust removal device for the boiler slag cooler outlet according to claim 4, characterized in that: The air inlet end of the air nozzle (10) is provided with a rotating tube (11) sleeved on the hard tube (7), both ends of the rotating tube (11) are provided with sealing rings (12), and the inner side of the rotating tube (11) is provided with an air hole (13) passing through the hard tube (7).

Images