CN205461578U - Tar filters and desulfurization integrated device - Google Patents

Abstract

The utility model discloses a tar filters and desulfurization integrated device, including desulphurization unit and burnt oil filter, open the desulphurization unit lower part has flue gas inlet, and open at the top has the exhanst gas outlet, desulphurization unit upper portion is equipped with at least one deck spray thrower, the spray thrower top is equipped with electrostatic precipitator, electrostatic precipitator includes corona wire and dust -collection polar plate, the flue gas inlet below is equipped with the water tank, flue gas inlet's the burnt oil filter of upper reaches installation, burnt oil filter includes the multiple -layer filtering net. Tar filters and desulfurization integrated device simple structure, construction and working costs are low, and owing to set up burnt oil filter and electrostatic precipitator, flue gas fog effects is good, and the dust collection efficiency of flue gas is high, and the flue gas has obtained fine purification behind the charcoal filtered tar, not only practiced thrift the energy but also reduced the pollution to the environment with it as fuel.

Description

An integrated device for tar filtration and desulfurization

technical field

The utility model belongs to the technical field of environmental protection, and in particular relates to an integrated device for tar filtering and desulfurization.

Background technique

my country is rich in coal resources, and coal is widely used as fuel in power generation, heating, metallurgy and other technical fields, resulting in huge emissions of sulfur dioxide in my country, causing serious pollution to the atmosphere. With the enhancement of people's awareness of environmental protection, the purification standards for flue gas emissions have been rapidly improved, especially strict flue gas emission standards have been formulated for coal-fired power boilers. Traditional flue gas desulfurization and tar filter equipment is composed of horizontal Venturi tubes, multiple sets of water spray pipes, main tower body and centrifugal separation device. Due to the limitation of its structure, there is a net flue gas passage port after desulfurization. The flue gas contains ash and mist, the dust and fog removal effect is not good, the desulfurization efficiency is low, the floor area is large, and the construction cost is high. There are three main desulfurization methods at present, namely wet process, semi-dry process and dry process. The desulfurization products of dry process and semi-dry process are dry powder, which are easy to handle and low in investment. The utilization rate of solvent is low, the desulfurization efficiency is low, the wet desulfurization efficiency is high, the calcium-sulfur ratio is low, the operation is simple, but the investment is large, and the system is unstable during long-term operation. The dust in the desulfurization process will block the flue in the system, resulting in unsatisfactory desulfurization effect of the system. The existing tar recovery device is not effective in recovering the tar in the flue dust, which not only wastes energy, but also pollutes the environment.

Utility model content

The technical problem to be solved by the utility model is to provide a simple structure, good desulfurization and denitrification effect for the deficiencies of the prior art, and can effectively solve the problem that the existing device has low or no effect on the removal of fine dust and heavy metal particles, causing environmental pollution. pollution problem.

The technical problem to be solved by the utility model is achieved through the following technical solutions:

An integrated device for tar filtering and desulfurization, comprising a desulfurization device and a tar filter, the lower part of the desulfurization device has a flue gas inlet, and the top part has a flue gas outlet, and the upper part of the desulfurization device is provided with at least one layer of sprayers, An electrostatic demister is provided above the sprayer, and the electrostatic demister includes a corona wire and a dust collecting plate, a water tank is provided below the flue gas inlet, and a tar filter is installed upstream of the flue gas inlet , the tar filter includes a multi-layer filter screen.

Further, charcoal is installed on the filter net.

Further, the multi-layer filter screen has at least three layers.

Further, a tray is arranged between the sprayer and the flue gas inlet, and the tray is a horizontal sieve plate, and spherical fillers are arranged on the sieve plate.

Further, the spherical packing is a plastic packing ball.

Further, a uniform flow grid composed of corner plates arranged horizontally at a certain interval is arranged under the shower, and the uniform flow grid can be provided with multiple layers, and the positions of the corner plates of each adjacent layer are staggered.

Compared with the prior art, the tar filter and desulfurization integrated device of the utility model has the following advantages: simple structure, low construction and operation costs. Since the tar filter and the electrostatic demister are installed, the smoke demisting effect is good, and the dust removal efficiency of the smoke is high. The flue gas is well purified after the tar is filtered by charcoal, and using it as fuel not only saves energy but also reduces environmental pollution.

The technical solutions of the present utility model are described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the structural representation of the utility model tar filtration and desulfurization integrated device;

Fig. 2 is the structural representation of the tray in the utility model tar filter and desulfurization integrated device;

Fig. 3 is a structural schematic diagram of the tar filter in the tar filter and desulfurization integrated device of the present invention.

In the figure: 1. Desulfurization device, 2. Flue gas inlet, 3. Flue gas outlet, 4. Sprayer, 5. Electrostatic demister, 6. Water tank, 7. Tar filter, 8. Tray, 9. Spherical Packing, 10, filter screen

detailed description

Fig. 1 is a schematic structural view of the tar filtration and desulfurization integrated device of the present invention, Fig. 2 is a structural schematic diagram of the tray in the tar filtration and desulfurization integration device of the present invention, and Fig. 3 is a tar filtration and desulfurization integration device of the present invention The structure schematic diagram of the tar filter, as shown in Fig. 1 and referring to Fig. 2 and Fig. 3, the utility model provides a kind of tar filtering and desulfurization integrated device, comprising a desulfurization device 1 and a tar filter 7, the lower part of the desulfurization device 1 is opened There is a flue gas inlet 2, and a flue gas outlet 3 is opened on the top. At least one layer of sprayer 4 is arranged on the upper part of the desulfurization device, and an electrostatic demister 5 is arranged above the sprayer. The electrostatic demister includes A corona wire and a dust-collecting plate, a water tank 6 is provided below the flue gas inlet, and a tar filter 7 is installed upstream of the flue gas inlet, and the tar filter 7 includes a multi-layer filter screen 10 .

Further, charcoal is installed on the filter screen 10 .

Further, the multi-layer filter screen has at least three layers.

Further, a tray 8 is arranged between the sprayer 4 and the flue gas inlet 2, and the tray is a flat sieve plate, and a spherical packing 9 is arranged on the sieve plate.

Further, the spherical packing is a plastic packing ball.

Further, below the sprinkler 4, a uniform flow grid composed of corner plates arranged horizontally at certain intervals is arranged. The uniform flow grid can be provided with multiple layers, and the positions of the corner plates of each adjacent layer are staggered. The uniform flow grid has the function of homogenizing the flue gas flow entering the demister, and further strengthening the effects of spraying, dust removal and desulfurization.

The working principle of the utility model desulfurization and demisting system is as follows:

During operation, the flue gas passes through the tar filter 7 arranged upstream of the flue gas inlet 2, as shown in Figure 3, and enters the desulfurization device 1. The tar filter 7 includes a multi-layer filter screen. Charcoal is installed on the filter net. The multi-layer filter screen has at least three layers. The flue gas after dedusting enters the desulfurization device 1 from the flue gas inlet 2 at the lower part of the desulfurization device 1 . The sprayer 4 installed on the top of the desulfurization device 1 sprays atomized ozone water to spray the flue gas that enters from the flue gas inlet and rises upwards. The sprayed ozone water and the ozone gas and smoke that have not dissolved in the water The nitrogen monoxide in the gas reacts chemically to form high-priced nitrogen oxides that can be dissolved in water, and then falls into the water tank 6 below the flue gas inlet. The sulfur dioxide and ozone in the flue gas synthesize sulfur trioxide, which is then combined with ozone water mist Also fall in the water tank 6 after generating sulfuric acid and vitriol. A tray 8 is arranged between the shower 4 and the flue gas inlet 2, and the tray is a flat sieve plate, and a spherical packing 9 is arranged on the sieve plate. The pressure drop generated by the tray further promotes the uniformity of the smoke distribution and provides a better guarantee for the uniform contact between the gas and the liquid in the shower washing area. A uniform flow grid can be set under the sprayer to homogenize the flue gas flow entering the demister, so as to further strengthen the effect of spray dust removal, desulfurization and denitrification. The flue gas after spraying and purification enters the electrostatic demister. The electrostatic demister uses DC high voltage to form a high-voltage uneven electric field to generate corona discharge, ionize the gas, and cause the dust particles and acid mist dispersed in the gas to meet with negatively charged ions and be charged. Under the action of the electric field force, it moves to the precipitation pole, so as to achieve the purpose of purifying the gas. The flue gas after the above treatment is discharged from the flue gas outlet on the top of the demister.

The above description is only the preferred embodiment of the present utility model, and it should be pointed out that those skilled in the art can make some changes without departing from the scope of the present utility model, so the above explanations contained and shown in the accompanying drawings The structure should be regarded as illustrative rather than limiting the protection scope of the utility model patent.

Claims (6)

1. A tar filtering and desulfurization integrated device is characterized in that, comprising a desulfurization device and a tar filter, the bottom of the desulfurization device has a flue gas inlet, and the top has a flue gas outlet, and the top of the desulfurization device is provided with at least A layer of shower, above the shower is provided with an electrostatic demister, the electrostatic demister includes a corona wire and a dust collection plate, a water tank is provided below the smoke inlet, and the smoke inlet A tar filter is installed upstream of the tar filter, and the tar filter includes a multi-layer filter screen. 2. The tar filter and desulfurization integrated device according to claim 1, characterized in that charcoal is installed on the filter screen. 3. The tar filter and desulfurization integrated device according to claim 2, characterized in that the multi-layer filter screen has at least three layers. 4. The tar filter and desulfurization integrated device according to claim 1, characterized in that a tray is arranged between the sprayer and the flue gas inlet, and the tray is a flat sieve plate, on which the sieve plate Spherical fillers are arranged on the top. 5. The integrated device for tar filtration and desulfurization according to claim 4, characterized in that, the spherical packing is a plastic packing ball. 6. The integrated device for tar filtration and desulfurization according to claim 1, characterized in that, a uniform flow grid composed of angled plates arranged horizontally at a certain interval is arranged under the sprayer, and the uniform flow grid can be provided with multiple layers, and the positions of the gussets of each adjacent layer are staggered.