CN204643238U - Raw coal bucket breather pipe dust-arrest device - Google Patents

Abstract

The utility model relates to an environmental protection device for dust suppression of a raw coal hopper between coal bunkers in a power plant, in particular to a dust suppression device for a ventilation pipe of a raw coal hopper. The dust suppression device for the ventilation pipe of the raw coal hopper is installed on the raw coal hopper between the coal bunkers, including a drainage pipe, a dust suppression chamber, a dust gas energy dissipator, and a ventilation pipe; the lower end of the dust suppression chamber is closed and communicated with the raw coal scuttle; The lower end of the drainage pipe is inserted into the raw coal scuttle, and the upper end of the drainage pipe is connected to the middle of the dust suppression chamber; the dust energy dissipator is arranged in the dust suppression chamber; the ventilation pipe is arranged above the dust suppression chamber, on the opposite side of the drainage pipe, Connected with the top of the dust suppression chamber. The utility model can well solve the problem of the dust escaping from the raw coal hopper, effectively suppress and lower the dust, and make the dust concentration in the workplace at the reloading point of the belt transportation system meet the national standard. It not only prevents the dust from polluting the environment, but also protects the vital interests of the workers at the post.

Description

Raw coal hopper ventilation pipe dust suppression device

technical field

The utility model relates to an environmental protection device for dust suppression of a raw coal hopper between coal bunkers in a power plant, in particular to a dust suppression device for a ventilation pipe of a raw coal hopper.

Background technique

The raw coal scuttle is a commonly used coal buffer building in power plants. When the coal flows into the raw coal scuttle through the inlet, due to the impact, a large amount of dust will be generated in the raw coal scuttle, and at the same time the coal will enter the raw coal scuttle, making the volume of the raw coal scuttle If it becomes smaller, the excess air will escape to the outside of the raw coal scuttle, and a large amount of dust will also escape with the air, causing dust to fly between the coal bunkers and pollute the environment.

At present, there is no particularly effective method for dust pollution caused by raw coal scuttles, because the amount of dust is large, and neither wet dust collector nor dry dust collector can continuously handle such a large amount of dust.

Contents of the invention

The purpose of this utility model is to provide a dust suppression device for the ventilation pipe of the raw coal scuttle, which can suppress the dust generated by the raw coal scuttle between the coal bunkers and solve the problem of the dust escaping from the raw coal scuttle.

In order to achieve the above object, the technical scheme of the utility model is:

The dust suppression device for the ventilation pipe of the raw coal hopper is installed on the raw coal hopper between the coal bunkers, including a drainage pipe, a dust suppression chamber, a dust gas energy dissipator, and a ventilation pipe; the lower end of the dust suppression chamber is closed and communicated with the raw coal scuttle; The lower end of the drainage pipe is inserted into the raw coal scuttle, and the upper end of the drainage pipe is connected to the middle of the dust suppression chamber; the dust energy dissipator is arranged in the dust suppression chamber; the ventilation pipe is arranged above the dust suppression chamber, on the opposite side of the drainage pipe, Connected with the top of the dust suppression chamber.

Further, the port connecting the dust suppression chamber and the raw coal scuttle is smaller than the diameter of the drainage pipe.

There are three groups of dust and gas energy dissipators, which are evenly distributed in the dust suppression chamber.

The central line of the ventilation pipe is aligned with the side of the dust suppression chamber, and the ventilation pipe is guided to the outside.

Beneficial effects of the utility model

The utility model can well solve the problem of dust escaping from the raw coal hopper, effectively suppress dust and reduce dust, and make the dust concentration in the workplace between the coal bunkers comply with the national standard GBZ2.1-2007 "Occupational Exposure Limits of Harmful Factors in the Workplace No. 1 Part" requirements. It not only prevents the dust from polluting the environment, but also protects the vital interests of the workers at the post.

Description of drawings

Fig. 1 is a front view of an embodiment of the utility model.

Fig. 2 is a schematic diagram of the dust suppression principle of the present invention.

In the figure: 1. Drainage pipe; 2. Dust suppression cavity; 3. Dust energy dissipator; 4. Ventilation pipe; 5. Raw coal hopper.

Detailed ways

Referring to Fig. 1, the raw coal scuttle ventilation pipe dust suppression device of the present utility model is arranged on the raw coal scuttle 5 between the coal bunkers; The upper end of the drainage pipe is connected with the middle part of the dust suppression chamber 2; the dust gas energy dissipator 3 is arranged in the dust suppression chamber 2; connected.

In this embodiment, the port connecting the dust suppression chamber 2 and the raw coal scuttle 5 is smaller in diameter than the drainage pipe 1 .

In this embodiment, there are three groups of dust and gas energy dissipators 3 , which are evenly distributed in the dust suppression chamber 2 .

In addition, the central line of the ventilation pipe 4 described in the utility model is aligned with the sides of the dust suppression chamber 2, and the ventilation pipe 4 is guided to the outside.

According to the actual situation, install a rainproof cap at the outlet end of the ventilation pipe.

Working process: see Figure 2, when feeding into the raw coal scuttle, the coal continuously impacts the existing coal in the raw coal scuttle, thereby generating a large amount of dust, which permeates the entire raw coal scuttle, as the raw coal scuttle is continuously filled , its volume keeps decreasing and the air pressure increases. Driven by aerodynamic force, the excess air carries a large amount of dust from the drainage pipe into the dust suppression chamber, and then is discharged outward through the ventilation pipe; during this process, the dust gas It will pass through three groups of dust gas energy dissipators in turn. Under the action of the dust gas energy dissipator, the kinetic energy of the dust gas will be consumed in a large amount. According to the principle of aerodynamics, most of the dust will continue to float in the air due to insufficient kinetic energy. The power will settle down and fall into the raw coal scuttle; a small part of dust will continue to move outdoors along the ventilation pipe because of its small particles and small mass, and the remaining aerodynamic force is still enough to make it float in the air; According to the national standard, the dust concentration of the gas discharged outdoors is 50mg/m ³ , and the dust concentration in the gas discharged outdoors after being treated by the dust suppression device of the ventilation pipe of the raw coal hopper fully meets the requirements of the national standard.

After the utility model is implemented, the problem of the dust escaping from the raw coal hopper can be well solved, the dust can be suppressed effectively, the air pollution can be reduced, and the working environment of the post workers can be improved.

Claims (4)

1. A raw coal hopper ventilation pipe dust suppression device is arranged on the raw coal hopper between coal bunkers, including a drainage pipe (1), a dust suppression chamber (2), a dust gas energy dissipator (3), and a ventilation pipe (4); It is characterized in that: the lower end of the dust suppression chamber (2) is closed and communicated with the raw coal scuttle (1); the lower end of the drainage pipe (1) is inserted into the raw coal scuttle (1), and the upper end of the drainage pipe (2) is connected to the dust suppression chamber (2) The middle part is connected; the dust and gas energy dissipator (3) is arranged in the dust suppression chamber (2); the ventilation pipe (4) is arranged above the dust suppression chamber (2), at the The opposite side communicates with the top of the dust suppression chamber (2). 2. The dust suppressing device for the ventilation pipe of the raw coal scuttle according to claim 1, characterized in that the port connecting the dust suppression chamber (2) to the raw coal scuttle is smaller than the diameter of the drainage pipe (1). 3. According to claim 1 or 2, the dust suppression device for the ventilation pipe of the raw coal hopper is characterized in that there are three groups of dust energy dissipators (3), which are evenly distributed in the dust suppression chamber (2). 4. The dust suppression device for ventilation pipes of raw coal hoppers according to claim 3, characterized in that: the center line of the ventilation pipe (4) is aligned with the side of the dust suppression chamber (2), and the ventilation pipe (4) is guided to the outside.