CN204768033U - Dust removal defogging device - Google Patents

Abstract

The utility model discloses a dedusting and demisting device, which comprises a plurality of modules connected in parallel, each of which includes a casing, and the casing is provided with an air inlet for air intake and an air outlet for air outlet. The air outlet and the turbulence member located between the air inlet and the air outlet are used to make the flue gas form a turbulence; the dust and mist removal device of the utility model, when the flue gas entering the air flow channel passes through the turbulence member, its airflow direction and speed The small water droplets and tiny particles in the flue gas form a turbulent flow and fully collide with each other, and collide with each other to form large droplets. The large droplets contact the inner wall of the housing and the surface of the spoiler to form a liquid film. The liquid film along the The flow out of the spoiler can remove fine dust and mist without adding additional power and material consumption. It has the characteristics of low pressure loss, high effect, low investment and operation costs, and is suitable for popularization and application.

Description

Dust and mist removal device

technical field

The utility model relates to a flue gas purification device, in particular to a dust and mist removal device.

Background technique

Large-scale coal-fired power plants in my country have basically installed desulfurization, denitrification, dust removal and other environmental protection devices, and the pollution of the flue gas of coal-fired power plants to the atmosphere has been controlled to a certain extent. Improvement, correspondingly promoting the introduction of higher environmental protection standards and the implementation of new environmental protection laws, making coal-fired power plants face higher requirements for the emission of flue gas pollutants under the new situation; with the increasing environmental protection emission standards, the emission standards of thermal power plants The requirements for ultra-low emissions have also been gradually raised, and they have been more and more widely used.

For the requirements of ultra-low emissions, there are currently two main technical routes. The first is to use wet electrostatic precipitator technology, and the second is to use a desulfurization system coupled with other strengthening measures. Option 1 has many application achievements in China at present, but its large investment, high cost, and complicated operation are common problems. Option two is the main direction of technology research and development because it saves investment and operating costs, and has various specific implementation technical routes.

For example, Chinese patent 204182256U discloses a water washing deep dust removal device, which is installed downstream of the wet desulfurization absorption tower. The dust and mist eliminator captures the mist in the flue gas, which can reduce the dust carrying amount in the flue gas, make the flue gas get advanced treatment, solve the technical problem of flue gas dust reaching the standard or even ultra-low emission, and can achieve a certain desulfurization effect , which greatly reduces the investment cost, saves land, and has high flexibility in layout and installation; however, although the removal of fine dust can be achieved by adding a water washing device, there are also complex washing processes, difficult system operation and maintenance, and pressure loss. Big and other issues. As another example, Chinese patent 201420676158.6 discloses a combined cyclone demist and dust removal system, which includes an absorption tower and a clean flue connected in sequence. The original flue gas inlet is provided on the side of the absorption tower, and a spraying system is provided in the absorption tower. The absorption tower is also equipped with a cyclone. The cyclone is located above the spray layer, and the spray layer is located above the original flue gas inlet. For tiny particles, under the same purification rate, the energy consumption of the system is much lower than that of the wet electrostatic precipitator, which reduces the operating cost; however, the system adds an evaporative cooling zone and a gravity separation zone, which makes the process system very complicated and consumes a lot of energy.

Therefore, in order to solve the above technical problems, there is a need for a dust and mist removal device, which is installed in the existing desulfurization tower and can remove fine dust and mist without adding additional power and material consumption. High characteristics, low investment and operating costs, suitable for popularization and application.

Utility model content

In view of this, the purpose of this utility model is to provide a dust removal and mist removal device, which is installed in the existing desulfurization tower, which can remove fine dust and mist without adding additional power and material consumption, and has low pressure loss, The utility model has the characteristics of high effect, low investment and operation cost, and is suitable for popularization and application.

The dust and mist removal device of the present utility model comprises several modules connected in parallel, and each of the modules includes a housing, and the housing is provided with an air inlet for air intake, an air outlet for air outlet and The turbulence member is located between the air inlet and the air outlet and is used to make the flue gas form a turbulent flow.

Further, the flow turbulence member includes a baffle set composed of several baffles, and the baffles are dislocated from bottom to top along the inner wall of the casing.

Further, the baffle is arranged obliquely to the horizontal plane, and a flue gas outlet for passing the flue gas is provided between the baffle and the inner wall of the casing.

Further, the air inlet is arranged at the bottom of the casing, and the air outlet is arranged at the top of the casing.

Beneficial effects of the utility model: the dust and mist removal device of the utility model is installed in the existing desulfurization tower. When it is located in the spray area, it can be used for cooperative desulfurization and dust removal. Dust removal: when the flue gas entering the airflow channel passes through the turbulence member, its airflow direction and speed are changed, and the small water droplets and tiny particles in the flue gas form a turbulent flow and fully collide with each other, and collide with each other to form large droplets. The inner wall of the shell and the surface of the turbulence member are in contact to form a liquid film, and the liquid film flows out along the turbulence member, which can remove fine dust and mist without adding additional power and material consumption, and has the characteristics of low pressure loss and high effect. The investment and operation costs are low, and it is suitable for popularization and application.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

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

Fig. 2 is a structural schematic diagram of the module of the utility model.

Detailed ways

As shown in Figures 1 and 2, the dust and mist removal device of this embodiment includes several modules connected in parallel, and each of the modules includes a columnar housing 1, and the housing 1 is provided with an air inlet. The air inlet 11, the air outlet 12 for air outlet, and the air flow channel between the air inlet 11 and the air outlet 12, the air flow channel is provided with a turbulence member for causing the flue gas to form a turbulence; the device is installed In the existing desulfurization tower, when it is located in the spray area, it can be used for cooperative desulfurization and dust removal, and when it is located above the spray layer, it can be used for deep dust removal; the combination form and number of modules can be determined according to the structure of the desulfurization tower. For example, it can be arranged in the form of a square in Figure 1, of course, it can also be arranged in a circular or triangular form, and the number of modules is determined according to the specific size of the desulfurization tower to ensure that the flue gas section is completely filled; the air inlet 11 is preferably located in the shell 1 The bottom of the housing 1, the gas outlet 12 is preferably located on the top of the housing 1, and the flue gas moves from bottom to top during use; the housing 1 is cylindrical or polygonal, and has a relatively high height, for example, the height can be 0.5-3.0m , according to the use requirements; in this embodiment, the turbulent member includes a baffle group composed of several baffles 4, and the baffles 4 are dislocated from bottom to top along the inner wall of the housing 1; the baffles The plate 4 is arranged obliquely on the horizontal plane, and a flue gas outlet for the passage of flue gas is provided between the partition plate 4 and the inner wall of the housing 1; the partition plate 4 is obliquely connected to the inner wall of the housing 1 to block the flow of the flue gas. The misalignment distribution means that the flue gas passages between different partitions and the inner wall are not on the same straight line. The dislocation of the flue gas passages plus the distance difference between the partition 4 and the inner wall at different heights makes the direction of the flue gas flow The speed and speed are changed, and the small water droplets and tiny particles in the flue gas form turbulence and fully collide with each other, collide with each other and agglomerate into large droplets, and the large droplets contact the inner wall of the housing 1 and the surface of the spoiler member to form a liquid film. The liquid film flows out along the spoiler, which can remove fine dust and mist without adding additional power and material consumption.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the spirit and scope of the technical solutions of the utility model shall be covered by the claims of the utility model.

Claims (4)

1. a dedusting demister, it is characterized in that: this device comprises several modules connected side by side, described in each, module includes housing, and described housing is provided with for the air inlet of air inlet, for the gas outlet of giving vent to anger and the flow-disturbing component for making flue gas form flow-disturbing between air inlet and gas outlet.

2. dedusting demister according to claim 1, is characterized in that: described flow-disturbing component comprises the dividing plate group be made up of some pieces of dividing plates, and described dividing plate is dislocatedly distributed from bottom to top along inner walls.

3. dedusting demister according to claim 2, is characterized in that: described dividing plate favours horizontal plane and arranges, and the flue gas be provided with between described dividing plate and inner walls for passing through for flue gas crosses mouth.

4. dedusting demister according to claim 1, it is characterized in that: described air inlet is located at the bottom of housing, described gas outlet is located at the top of housing.