CN212818868U - Dust removing device with low pollution emission for thermal power plant - Google Patents

Abstract

Dust collector that thermal power plant low pollution discharged belongs to thermal power plant and discharges technical field, the utility model discloses a dust removal performance who solves current dust collector receives other factors to influence to lead to dust collection efficiency to descend, and remove dust and remove sulfur dioxide and need lead to discharging respectively and prevent and control complicated problem. It comprises a dust remover and a sedimentation tank; the dust remover comprises a dust removing barrel, a spraying stirrer, a water injection pipe, a connecting rod gear, a rotating shaft gear and a bracket; the dedusting barrel is a cylinder, a through hole for installing a water injection pipe is formed in the middle of an upper cover of the dedusting barrel, the spraying stirrer is installed at the bottom end of the water injection pipe, the top of the water injection pipe is installed on the connecting rod gear, the top end of the water injection pipe is communicated with an external water injection port, the connecting rod gear is meshed with the rotating shaft gear, the rotating shaft gear is installed at the top end of the support, the bottom end of the support is installed on the outer side surface of the dedusting barrel, a discharge port is formed in the bottom of the dedusting barrel; the rotating shaft gear is driven by a motor. The utility model discloses thermal power plant removes pollution.

Description

Dust removing device with low pollution emission for thermal power plant

Technical Field

The utility model relates to a dust collector that removes of low pollution emission of thermal power plant belongs to thermal power plant and discharges technical field.

Background

During the production of thermal power plants, the environmental impact of various emissions beyond certain limits can cause degradation of environmental quality. The exhaust pollutants of thermal power plants include solid, liquid, gaseous and noise. The method mainly comprises the following steps:

dust particles: mainly refers to dust particles discharged by coal-fired power plants, and the dust particles not only pollute the environment, but also are combined with harmful gases such as sulfur dioxide, nitrogen oxide and the like to aggravate the damage to the environment. Especially, the dust below 10 μm is harmful to human body.

Sulfur dioxide: the combustible sulfur in the coal is combusted at high temperature by the boiler, most of the combustible sulfur is oxidized into sulfur dioxide, the sulfur dioxide discharged into the atmosphere is very harmful to human bodies, animals and plants, and the sulfur dioxide in the atmosphere is the main cause of acid rain.

Nitrogen oxide: the nitric oxide discharged from thermal power plants is mainly nitric oxide, which accounts for more than 90% of the total concentration of the nitric oxide, and the nitric oxide can cause methemoglobinemia and damage central nerves.

Waste water: the waste water of the thermal power plant mainly comprises ash flushing water, dedusting water, industrial sewage, domestic sewage, acid-base waste liquid, hot drainage water and the like. Both the dust-removing water and the industrial sewage are generally discharged into a grey water system.

Fly ash slag: is the solid waste discharged after the coal is burnt. The main components of the composite material are silicon dioxide, aluminum oxide, ferric oxide, calcium oxide, magnesium oxide and partial trace elements. Fly ash is both "waste" and "resource". If the waste water is not well treated and discharged into rivers, lakes and seas, water body pollution can be caused; the random stacking causes pollution to the atmospheric environment.

Noise: the noise of the thermal power plant mainly comprises high-frequency noise of boiler exhaust, aerodynamic noise and mechanical vibration noise when equipment operates, low-frequency electromagnetic noise of electrical equipment and the like. Wherein the influence on the environment is the largest by the exhaust noise of the boiler.

For the prevention and treatment of dust particles and sulfur dioxide, the flue gas after the combustion of the boiler is dedusted by a dedusting device and then is sent to a desulfurizing device, and the gas desulfurized by spraying stone slurry is sent to a chimney through a suction fan and is discharged.

The existing dust removal device of the thermal power plant comprises two dust removal technologies, namely a bag type dust removal technology and an electric dust removal technology.

The bag type dust removal technology is that after dust-containing gas enters a bag type dust remover, dust with large particles and large specific gravity is settled under the action of gravity and falls into an ash hopper, and the dust is blocked when the gas containing fine dust passes through a filter material, so that the gas is purified. The disadvantages are: (1) the performance of the dust removal mode is influenced by the operation conditions of equipment, the concentration of inlet smoke dust, the installation quality and the like, and particularly, the dust removal effect is influenced by the matching of the type selection of the filter material and the smoke components; (2) along with the filtration, the resistance is continuously increased, and the ash needs to be removed.

The electric dust removing technology is that in a high-voltage electric field, dust or particulate matters suspended in dust-containing gas are charged under the action of gas ionization, charged particles move to electrodes with opposite polarities under the action of the electric field force and are adsorbed on the electrodes, the charged particles fall off from the surfaces of the electrodes through vibration, scouring and the like, and fall into an ash bucket under the action of gravity, so that the dust removing process is realized. The disadvantages are: the electric dust removal technology has the problems of secondary dust raising and insufficient charge of fine dust caused by back corona and vibration phenomena caused by high-specific-resistance dust, and the like, and further causes the problem of reduced dust removal efficiency.

In summary, the problems of the prior art for preventing and treating dust particles and sulfur dioxide include:

(1) the removal of dust particles and sulfur dioxide needs to be carried out respectively, and the prevention and control steps are complex;

(2) the method for removing dust particles is influenced by other factors such as installation quality, filter material type selection and the like, so that the dust removal effect is poor and the dust removal efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving current dust collector's dust removal performance and receiving other factor influences to lead to dust collection efficiency to descend, and remove dust and remove the sulfur dioxide and need lead to discharging respectively and prevent and control complicated problem, provide a dust collector that thermal power plant low pollution discharged.

The utility model relates to a low-pollution emission dust removal device for a thermal power plant, which comprises a dust remover and a sedimentation tank;

the dust remover is communicated with the sedimentation tank through a pipeline;

the dust remover comprises a dust removing barrel, a spraying stirrer, a water injection pipe, a connecting rod gear, a rotating shaft gear and a bracket;

the dedusting barrel is a cylinder, a through hole for installing a water injection pipe is formed in the middle of an upper cover of the dedusting barrel, the spraying stirrer is installed at the bottom end of the water injection pipe, the top of the water injection pipe is installed on the connecting rod gear, the top end of the water injection pipe is communicated with an external water injection port, the connecting rod gear is meshed with the rotating shaft gear, the rotating shaft gear is installed at the top end of the support, the bottom end of the support is installed on the outer side surface of the dedusting barrel, a discharge port is formed in the bottom of the dedusting barrel;

the rotating shaft gear is driven by a motor.

Preferably, the spraying stirrer comprises two trapezoidal stirring parts which are installed in a crossed mode, a plurality of spraying ports are installed on the side wall of each trapezoidal stirring part, and the spraying ports are communicated with the water injection pipe.

Preferably, a water outlet is formed in the side wall of the upper part of the sedimentation tank and is communicated with the water injection pipe through a pipeline.

Preferably, a water purification device is arranged at the water outlet.

The utility model has the advantages that: the utility model provides a dust collector that removes of low pollution emission of thermal power plant adopts the dust remover to fully fuse dust and sulfur dioxide and water, and the mud after fusing discharges to the sedimentation tank and deposits, and its advantage includes:

1. after the dust and the sulfur dioxide are stirred by a spraying stirrer, the dust and the sulfur dioxide are fully fused with water, so that the dust removal effect is good;

2. no material consumption such as a filter screen is needed, and the method is economical and practical;

3. electrodes are not needed, dust removal is thorough, and dust removal efficiency is improved;

4. can remove dust and sulfur dioxide simultaneously, and simplify the prevention and control steps.

The dust removal device with low pollution emission of the thermal power plant has the dust treatment rate of over 99 percent and the treatment rate of harmful gases such as sulfur dioxide and the like of more than 60 percent,

drawings

FIG. 1 is a schematic structural diagram of a dust removing device with low pollutant emission of a thermal power plant according to the present invention;

FIG. 2 is a schematic structural view of the dust collector of the present invention;

fig. 3 is a schematic view of another state of the dust collector of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

The first embodiment is as follows: the following describes the present embodiment with reference to fig. 1 to 3, and the dust removing device with low pollutant discharge of the thermal power plant in the present embodiment includes a dust remover 1 and a sedimentation tank 2;

the dust remover 1 is communicated with the sedimentation tank 2 through a pipeline 3;

the dust remover 1 comprises a dust removing barrel 1-1, a spraying stirrer 1-2, a water injection pipe 1-3, a connecting rod gear 1-4, a rotating shaft gear 1-5 and a bracket 1-6;

the dedusting barrel 1-1 is a cylinder, a through hole for installing a water injection pipe 1-3 is arranged in the middle of an upper cover of the dedusting barrel 1-1, a spraying stirrer 1-2 is installed at the bottom end of the water injection pipe 1-3, the top of the water injection pipe 1-3 is installed on a connecting rod gear 1-4, the top end of the water injection pipe 1-3 is communicated with an external water injection port, the connecting rod gear 1-4 is meshed with a rotating shaft gear 1-5, the rotating shaft gear 1-5 is installed at the top end of a support 1-6, the bottom end of the support 1-6 is installed on the outer side surface of the dedusting barrel 1-1, a discharge port is arranged at the bottom of the dedusting barrel 1-1, and;

the rotating shaft gears 1-5 are driven by a motor.

Further, the spraying stirrer 1-2 comprises two trapezoidal stirring parts which are arranged in a crossed manner, a plurality of spraying ports are arranged on the side wall of each trapezoidal stirring part, and the spraying ports are communicated with the water injection pipes 1-3.

Furthermore, a water outlet 2-1 is formed in the side wall of the upper portion of the sedimentation tank 2, and the water outlet 2-1 is communicated with the top end of the water injection pipe 1-3 through a pipeline.

Still further, a water purification device is arranged at the water outlet 2-1.

The working principle of the present invention is described below with reference to fig. 1 to 3: the flue gas that boiler burning produced discharges to dust removal bucket 1-1, and the motor drive pivot gear 1-5 rotates, and then drives the connecting rod gear 1-4 with pivot gear 1-5 meshing and rotate, and the water injection pipe 1-3 top that installs on connecting rod gear 1-4 rotates along with it, drives and installs spraying agitator 1-2 in the water injection pipe 1-3 bottom and rotates in dust removal bucket 1-1, and spraying agitator 1-2 pivoted in-process, the spraying mouth that sets up on it and water injection pipe 1-3 intercommunication spouts water smoke, and the water smoke fuses together with the dust and the sulfur dioxide in the flue gas, and the mud after fusing is discharged to sedimentation tank 2 through pipeline 3. The water precipitated by the sedimentation tank 2 is purified and then discharged to the water injection pipes 1-3, and can be recycled.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims (4)

1. The dust removal device with low pollution emission in a thermal power plant is characterized by comprising a dust remover (1) and a sedimentation tank (2);

the dust remover (1) is communicated with the sedimentation tank (2) through a pipeline (3);

the dust remover (1) comprises a dust removing barrel (1-1), a spraying stirrer (1-2), a water injection pipe (1-3), a connecting rod gear (1-4), a rotating shaft gear (1-5) and a bracket (1-6);

the dedusting device is characterized in that the dedusting barrel (1-1) is a cylinder, a through hole for installing a water injection pipe (1-3) is formed in the middle of an upper cover of the dedusting barrel (1-1), a spraying stirrer (1-2) is installed at the bottom end of the water injection pipe (1-3), the top of the water injection pipe (1-3) is installed on a connecting rod gear (1-4), the top end of the water injection pipe (1-3) is communicated with an external water injection port, the connecting rod gear (1-4) is meshed with a rotating shaft gear (1-5), the rotating shaft gear (1-5) is installed at the top end of a support (1-6), the bottom end of the support (1-6) is installed on the outer side face of the dedusting barrel (1-1), a discharge port is formed in the bottom of the dedusting barrel (1-1), and one end;

the rotating shaft gears (1-5) are driven by a motor.

2. The dust removing device with low pollution emission for the thermal power plant as claimed in claim 1, wherein the spraying stirrer (1-2) comprises two trapezoidal stirring parts, the two trapezoidal stirring parts are installed in a crossed manner, a plurality of spraying ports are installed on the side wall of the trapezoidal stirring part, and the spraying ports are communicated with the water injection pipes (1-3).

3. The dust removing device with low pollution emission for thermal power plant according to claim 1, wherein a water outlet (2-1) is opened on the side wall of the upper part of the sedimentation basin (2), and the water outlet (2-1) is communicated with the top end of the water injection pipe (1-3) through a pipeline.

4. The dust removing device with low polluting emission for thermal power plant as claimed in claim 3, wherein a water purification device is provided at said water outlet (2-1).

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