CN104645768B - A kind of Wet type cyclone dust arrester - Google Patents

Abstract

The invention relates to a dust removal device, in particular to a wet cyclone dust removal device, which belongs to the technical field of environmental protection equipment. The wet cyclone dust removal device includes a humidification tower, a gas-liquid coupler, a venturi tube and a cyclone separator connected in sequence , the humidification tower is provided with a spraying device, the dusty flue gas enters from the humidification tower, and the clean flue gas is discharged from the cyclone separator. Compared with the prior art, the present invention combines several dust removal methods, Reasonable and compact structural design, small footprint, low cost, easy installation and maintenance; dust removal efficiency up to 99.9%; low equipment loss and long service life.

Description

A wet cyclone dust removal device

technical field

The invention relates to a dust removal device, in particular to a wet cyclone dust removal device, which belongs to the technical field of environmental protection equipment.

Background technique

At present, domestic gas dedusting technologies mainly include electric dust removal, bag dust removal, wet dust removal, mechanical dust removal, etc. Among them, electric dust removal and bag dust removal have the disadvantages of large area occupation, high cost, and high operating cost; wet dust removal is easy to cause corrosion to equipment, The loss is large; the dust removal efficiency of mechanical dust removal is not high. In order to make up for the defects of various methods, several methods are used in combination. However, in the prior art, the dust removal equipment combined with several methods has high cost, complex structure, inconvenient installation, difficult maintenance and high operating cost.

The patent application number is 97225432.3 discloses a wet desulfurization cyclone dust collector, its structure includes a cyclone, a Venturi tube and a water bath dust collector, although it combines several dust removal equipment, but it is provided with a water spray in the contraction section of the Venturi tube Head, so that the wear and tear of the Venturi tube is accelerated, in practical applications, the Venturi tube needs to be replaced regularly, and the use cost is high; at the same time, the sewage treatment burden of this technology is heavy, and the operating cost of the entire device is high.

Contents of the invention

The object of the present invention is to provide a wet cyclone dedusting device for the deficiencies of the prior art.

The technical scheme for solving the problem of the present invention is to provide a wet cyclone dedusting device, including a humidifying tower, a gas-liquid coupler, a venturi tube and a cyclone separator connected in sequence; Inlet and spraying device, the spraying device includes a water inlet pipe, a control valve and several water mist nozzles; a plurality of blades; the Venturi tube includes a constriction section, a throat, and a diffuser section; the cyclone separator includes a cyclone separator inlet, a cyclone separator body, an ash cylinder, an ash outlet, a central exhaust pipe, and a filter and the net flue gas outlet; the constriction section of the Venturi tube is connected with the gas-liquid coupler, and the diffusion section of the Venturi tube is connected with the cyclone separator inlet.

Further, the plurality of water mist nozzles are uniformly and equidistantly arranged, and the opening directions of the water mist nozzles are all horizontally facing the gas-liquid coupler, that is, consistent with the inflow direction of the airflow, which is beneficial to ensure that the dust-laden gas is still an unsaturated gas, Avoid dust in supersaturated gas from adhering to downstream equipment and causing inconvenient removal.

Further, the blades of the gas-liquid coupler are radially and uniformly inclined.

Further, the cyclone separator is a counter-flow barrel-cone separator with a tangential inlet.

Further, the cyclone separator body includes a cylinder part and a cone part, and the cone part is located below the cylinder part and integrated into one body.

Preferably, the ratio of the height of the cyclone separator body to the diameter of the cylinder part is 4-4.5:1, which is beneficial to improve dust removal efficiency.

Further, the bottom of the cone is an ash tube, and the end of the ash tube is an ash discharge port.

Preferably, the lower edge of the central exhaust pipe is flush with the lower edge of the cyclone separator inlet.

Further, the filter is arranged on the upper part of the central exhaust pipe and below the outlet of the clean flue gas.

Further, the internal structure of the dust removal device is coated with an anti-corrosion layer to prevent the dust-laden gas from corroding the equipment.

The beneficial effects of dust removal device of the present invention are:

1. The structure design of the dust removal device is reasonable and compact, occupies a small area, is low in cost, and is convenient for installation and maintenance;

2. The dust removal device combines several dust removal methods, especially the orderly combination of humidification tower, gas-liquid coupler, Venturi tube and cyclone separator, which is beneficial to remove dust, and the dust removal efficiency is as high as 99.9%;

3. By designing the humidification link before the Venturi tube, instead of designing the humidification equipment on the Venturi tube, and the design of the anti-corrosion layer, the equipment loss is small and the service life is long.

Description of drawings

Fig. 1 is a schematic structural view of the wet cyclone dust removal device of the present invention.

Fig. 2 is a left view of the gas-liquid coupler of the wet cyclone dust removal device of the present invention.

In the figure: 1-humidification tower, 11-dusty flue gas inlet, 12-spray device, 121-water inlet pipe, 122-control valve, 123-water mist nozzle; 2-gas-liquid coupler, 21-flow diversion Cylinder, 22-blade; 3-Venturi tube, 31-constriction section, 32-throat, 33-diffusion section; 4-cyclone separator, 41-cyclone separator inlet, 42-cyclone separator body, 43-ash Tube, 44-ash outlet, 45-center exhaust pipe, 46-filter, 47-clean flue gas outlet.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, the wet cyclone dedusting device of the present invention comprises a humidifying tower 1, a gas-liquid coupler 2, a Venturi tube 3 and a cyclone separator 4 connected in sequence; The inlet 11 and the spraying device 12, the spraying device 12 includes a water inlet pipe 121, a control valve 122 and several water mist nozzles 123; A plurality of vanes 22 between adjacent draft tubes 21; the Venturi tube 3 includes a constriction section 31, a throat 32 and a diffuser section 33; the cyclone separator 4 includes a cyclone separator inlet 41, a cyclone separator Body 42, ash barrel 43, ash outlet 44, central exhaust pipe 45, filter 46 and net flue gas outlet 47; the contraction section 31 of the venturi tube 3 is connected with the gas-liquid coupler 2, and the venturi The diffuser section 33 of the pipe 3 is connected to the cyclone inlet 41 .

The plurality of water mist nozzles 123 are uniformly and equidistantly arranged, and the opening directions of the water mist nozzles 123 are all facing the gas-liquid coupler 2 horizontally, that is, consistent with the inflow direction of the airflow.

The blades 22 of the gas-liquid coupler 2 are radially and uniformly inclined.

The cyclone separator 4 is a counter-flow barrel-cone separator with a tangential inlet.

The cyclone separator body 42 includes a cylinder part and a cone part, and the cone part is located below the cylinder part and integrated into one body.

The ratio of the height of the cyclone separator body 42 to the diameter of the cylinder part is 4-4.5:1, which is beneficial to improve the dust removal efficiency.

Below the cone part is an ash tube 43 , and the end of the ash tube 43 is an ash discharge port 44 .

The lower edge of the central exhaust pipe 45 is flush with the lower edge of the cyclone separator inlet 41 .

The filter 46 is arranged on the upper part of the central exhaust pipe 45 and below the clean flue gas outlet 47 .

All the internal devices of the dust removal device are coated with an anti-corrosion layer to prevent the dust-laden gas from corroding the equipment.

The working process of the wet cyclone dedusting device of the present invention is as follows:

The dust-laden gas enters the humidification tower through the dust-laden flue gas inlet, and the water mist nozzle in the humidification tower sprays well-atomized water into the gas; the humidified dust-laden gas passes through the gas-liquid coupler to further increase the atomization The mixing uniformity of the water, while the dust will hit and gather on the surface of the gas-liquid coupler blade, so that the particle size can be increased; then the dust-laden gas enters the Venturi tube, and in the Venturi tube, due to the reduction of the gas flow section, the gas flow The volume is compressed, and in the process of gas compression, the dust in the gas can be collided, bonded, and the particle size is further increased. Due to the upstream water spray humidification, the adhesion of the dust is increased, so it is easier to agglomerate into a smaller particle size. Large dust; the dust-containing gas compressed by the Venturi tube enters the cyclone separator tangentially, and the airflow moves downward in a spiral shape along the cylinder, and the dust particles are thrown to the wall of the device under the action of centrifugal force, and fall along the wall into the cyclone separator. Ash tube: the rotating air flow contracts in the cyclone separator body and flows towards the center, forming a secondary vortex upwards and entering the filter through the central exhaust pipe, and the filtered gas is discharged through the clean flue gas outlet.

The present invention is not limited to the above-mentioned embodiments, and without departing from the essence of the present invention, any deformation, improvement, and replacement conceivable by those skilled in the art fall within the protection scope of the present invention.

Claims (8)

1. a Wet type cyclone dust arrester, it is characterised in that include being sequentially connected conditioning Tower, gas-liquid coupler, Venturi tube and the cyclone separator connect；Described conditioning Tower is provided with ash-laden gas entrance and spray equipment, and described spray equipment includes water inlet pipe, control valve and some hydraulic spray nozzles；Described gas-liquid coupler includes some sheathed guide shells being fixed together and the multiple blades being arranged between adjacent guide cylinder；Described Venturi tube includes contraction section, throat and diffuser；Described cyclone separator includes cyclone inlet, cyclone separator body, ash cylinder, ash discharging hole, central row trachea, filter and neat stress outlet；Described gas-liquid coupler is arranged on spray equipment downstream direction, described some hydraulic spray nozzles are arranged in ash-laden gas entrance, described some hydraulic spray nozzles are for be uniformly placed equidistant, the opening direction of described hydraulic spray nozzle the most horizontally toward gas-liquid coupler, the contraction section of described Venturi tube is connected with gas-liquid coupler, the diffuser of described Venturi tube is connected with cyclone inlet, and the height of described cyclone separator body is 4～4.5:1 with the ratio of the diameter of its shell portion.

Wet type cyclone dust arrester the most according to claim 1, it is characterised in that the blade of described gas-liquid coupler is the most radially uniform to be in tilted layout.

Wet type cyclone dust arrester the most according to claim 1, it is characterised in that described cyclone separator is the reverse-flow cylinder cone separator with tangential inlet.

Wet type cyclone dust arrester the most according to claim 1, it is characterised in that described cyclone separator body includes that shell portion and conical section, described conical section are positioned at the lower section of described shell portion, and are combined as a whole.

Wet type cyclone dust arrester the most according to claim 4, it is characterised in that the lower section of described conical section is ash cylinder, the end of described ash cylinder is ash discharging hole.

Wet type cyclone dust arrester the most according to claim 1, it is characterised in that the lower edge of described central row trachea is lower along concordant with described cyclone inlet.

Wet type cyclone dust arrester the most according to claim 1, it is characterised in that the top of the centrally disposed exhaustor of described filter, the lower section of neat stress outlet.

Wet type cyclone dust arrester the most according to claim 1, it is characterised in that the internal structure of described dust arrester all applies anticorrosive coat.