CN206889013U - A kind of thermal power plant's coal yard spray dust-arrest device - Google Patents

Abstract

The utility model discloses a spray dust suppressor for a thermal power plant coal yard, which comprises a centrifugal fan, a telescopic connecting pipe, an air outlet pipe, a central nozzle and a driving device for adjusting the pitch angle of the air outlet pipe; The outlet is connected to the air outlet pipe through a telescopic connecting pipe. A central nozzle is arranged at the center of the air outlet of the air outlet pipe. The water inlet of the central nozzle is connected to a water pump. The output shaft of the driving device is connected with the outer wall of the air outlet pipe. The dust suppressor has the characteristics of long shooting range, strong airflow mist-carrying ability and low energy consumption for reversing.

Description

A spray dust suppressor for a thermal power plant coal yard

technical field

The utility model relates to a spray dust suppressor, in particular to a spray dust suppressor for a thermal power plant coal yard.

Background technique

In order to meet the needs of continuous production, thermal power plants usually have large coal yards for stacking and storing coal. Coal in the coal yard will inevitably generate a large amount of coal dust during the process of stacking and reclaiming and belt transportation, causing environmental pollution and bringing hidden dangers of dust deflagration. At present, spraying devices are mostly used in coal yards to increase air humidity and suppress the coal surface from flying. The coal yard sprayer currently used in the power plant is mainly composed of axial flow fan + high-pressure atomizing nozzle. The working principle is: using the booster water pump and the atomizing nozzle installed on the annular pipe at the outlet of the fan to form a conical water mist layer, When the airflow at the outlet of the fan passes through the water mist layer, the mist droplets are carried and transported to a distant place for settlement, and finally play the role of humidification and dust suppression.

There are following problems in above-mentioned sprayer:

1) Low wind pressure and short range. In order to realize the miniaturization of the equipment, the conventional air-driven sprayer adopts the axial flow fan. Under the same motor power, the axial flow fan has low wind pressure and large air volume, while the centrifugal fan has high wind pressure and small air volume. For large coal yards, there is no doubt that high range and large coverage are required, so conventional atomizers urgently need to increase the range.

2) The airflow has poor mist-carrying ability. An inwardly inclined atomizing nozzle is installed on the annular pipe of the fan outlet, which will form an inwardly contracting, conical water mist layer after activation. The existence of this inner shrinkage water mist layer, on the one hand, increases the resistance of the outlet airflow, and the mixing of the mist and the airflow is not uniform enough; The final mist droplets will not be carried by the air flow, and will directly land nearby. For the coal yard demister that needs to be operated for a long time, this will cause a large waste of water resources.

3) High energy consumption for commutation. Due to the integrated design of the axial flow fan and the air outlet, when adjusting the pitch angle of the air outlet, it is necessary to move the fan and the motor with a large mass up and down, which undoubtedly increases the burden on the hydraulic device and increases the Increased energy consumption of the entire system.

Utility model content

The purpose of the utility model is to overcome the above-mentioned shortcomings of the prior art, and provide a spray dust suppressor for the coal yard of a thermal power plant, which has the characteristics of long shooting range, strong mist-carrying ability of airflow and low energy consumption for reversing.

In order to achieve the above object, the thermal power plant coal yard spray dust suppressor described in the utility model includes a centrifugal fan, a telescopic connecting pipe, an air outlet pipe, a central nozzle and a driving device for adjusting the pitch angle of the air outlet pipe;

The outlet of the centrifugal fan is connected to the air outlet pipe through a telescopic connecting pipe. The center of the air outlet of the air outlet pipe is provided with a central nozzle, and the water inlet of the central nozzle is connected to a water pump. connected.

The driving device includes a hydraulic adjustment rod and a hydraulic pump for driving the hydraulic adjustment rod to expand and contract, wherein the end of the hydraulic adjustment rod is connected to the outer wall of the air outlet pipe.

The water outlet of the water pump communicates with the central nozzle through the water pipe.

The utility model has the following beneficial effects:

During specific operation of the coal yard spray dust suppressor of the thermal power plant described in the utility model, under the same motor power, the wind pressure of the centrifugal fan is higher than that of the axial flow fan, and the higher wind pressure is beneficial to increase The range of the airflow improves the coverage of the dust suppressor; the central nozzle is installed at the center of the air outlet pipe, through which a diffused water mist layer is formed, and the autonomous diffusion of the mist is basically consistent with the flow direction of the airflow, thereby reducing the water The resistance of the fog layer to the airflow, the airflow carries the mist droplets from all around, thereby enhancing the uniformity of the airflow to the mist droplets, avoiding the direct settlement of the uncarried mist droplets, the airflow has a strong mist-carrying ability, and saves water resources; at the same time , when adjusting the angle of the air outlet pipe, the utility model only needs to adjust the air outlet pipe with a small weight by means of the telescopic connecting pipe to realize the adjustment of the pitch angle, which greatly reduces the burden on the driving device and reduces the system load. energy consumption.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Among them, 1 is a centrifugal fan, 2 is a telescopic connecting pipe, 3 is an air outlet pipe, 4 is a central nozzle, 5 is a water pipe, 6 is a water pump, 7 is a hydraulic adjustment rod, and 8 is a hydraulic pump.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in further detail:

With reference to Fig. 1, the thermal power plant coal yard spray dust suppressor described in the utility model comprises a centrifugal blower fan 1, a telescopic connecting pipe 2, an air outlet pipe 3, a central nozzle 4 and a device for adjusting the pitch angle of the air outlet pipe 3 Drive device; the outlet of the centrifugal fan 1 communicates with the air outlet pipe 3 through the telescopic connecting pipe 2, the central position of the air outlet of the air outlet pipe 3 is provided with a central nozzle 4, and the water inlet of the central nozzle 4 is connected with a water pump 6 to drive The output shaft of the device is connected with the outer wall of the air outlet pipe 3 .

The driving device includes a hydraulic adjustment rod 7 and a hydraulic pump 8 for driving the hydraulic adjustment rod 7 to expand and contract, wherein the end of the hydraulic adjustment rod 7 is connected to the outer wall of the air outlet pipe 3; It communicates with the center nozzle 4.

Concrete work process of the present utility model is:

Start the hydraulic pump 8, the hydraulic pump 8 drives the hydraulic adjustment rod 7 to expand and contract, adjust the pitch angle of the air outlet pipe 3 through the hydraulic adjustment rod 7, and then turn on the water pump 6, the water output by the water pump 6 is sprayed out through the central nozzle 4, and forms an external diffusion Finally, start the centrifugal fan 1 to blow the mist to the destination.

Claims (3)

1. A kind of 1. thermal power plant's coal yard spray dust-arrest device, it is characterised in that including centrifugal fan (1), telescopic connecting tube (2), The drive device of discharge pipe (3), central nozzle (4) and the angle of pitch for adjusting discharge pipe (3)；

   The outlet of centrifugal fan (1) is connected through telescopic connecting tube (2) with discharge pipe (3), in discharge pipe (3) air outlet Heart position is provided with central nozzle (4), and the water inlet of central nozzle (4) is communicated with water pump (6), and the output shaft of drive device is with going out The outer wall of airduct (3) is connected.
2. 2. thermal power plant's coal yard spray dust-arrest device according to claim 1, it is characterised in that the drive device includes hydraulic pressure Adjusting rod (7) and for driving the flexible hydraulic pump (8) of hydraulic regulation bar (7), wherein, the end of hydraulic regulation bar (7) with The outer wall of discharge pipe (3) is connected.
3. 3. thermal power plant's coal yard spray dust-arrest device according to claim 1, it is characterised in that the delivery port of water pump (6) is through water Pipe (5) is connected with central nozzle (4).