CN104759351B - A kind of cellular bamboo slab rubber wet electrical dust precipitator anode - Google Patents

Abstract

The invention provides an anode of a honeycomb bamboo plywood wet type electrostatic precipitator, which belongs to the field of environmental engineering. The anode of the electrostatic precipitator is bamboo plywood. The thickness of the bamboo plywood is 0.2-3mm; the surface of the bamboo plywood is coated with graphite powder or activated carbon powder. The bamboo plywood is folded to form a bridge-shaped unit, and the anode of the wet electrostatic precipitator of the present invention is a honeycomb structure formed by splicing and inserting countless of the above-mentioned units. The invention adopts special bamboo plywood, and is designed as a detachable unit, which not only reduces the cost, simplifies the production process, facilitates transportation and installation, but also reduces the weight of the anode plate, and solves the problem that the anode is easily corroded and accumulated dust In order to solve the problem of low efficiency, the bamboo plywood of the present invention can also be fired into activated carbon as a new coating of bamboo plywood after use, which is in line with the concept of circular economy in my country.

Description

An anode of a honeycomb bamboo plywood wet electrostatic precipitator

technical field

The invention relates to the field of environmental engineering, in particular to an anode of a honeycomb bamboo plywood wet-type electrostatic precipitator.

Background technique

At present, air pollution and environmental problems frequently occur in China, and smog pollution is becoming more and more serious. According to the Environmental Statistical Annual Report of the Ministry of Environmental Protection in 2013, the national industrial smoke (powder) dust emissions were 10.946 million tons, accounting for 85.6% of the country's total smoke (powder) dust emissions. The aforementioned industrial pollution is mainly concentrated in the three industries of electricity and heat production and supply, ferrous metal smelting and rolling processing, and non-metallic mineral products.

In order to solve the increasingly serious environmental problem of air pollution, the Chinese government paid close attention to it and officially released the first "National Air Pollution Prevention and Control Action Plan (2013-2017)" on September 12, 2013. It is required that by 2017, the concentration of inhalable particulate matter in cities at the prefecture level and above across the country will be reduced by more than 10% compared with 2012; The annual average concentration of fine particles in Beijing is controlled at around 60 micrograms per cubic meter. If the "National Air Pollution Prevention and Control Action Plan (2013-2017)" is fully implemented, it is estimated that the national particulate matter emissions will drop by 29.1% in 2017, and the annual average PM2.5 concentration in cities across the country will drop by 22%.

Wet electrostatic precipitators are developed for the application of industrial flue gas particulate matter with high moisture content exceeding the standard. With the increasingly stringent dust concentration control standards in my country, the application of wet electrostatic precipitators will be more extensive, and the key to wet electrostatic precipitators The part is an electrostatic precipitator anode. Existing wet type electrostatic precipitator anode has at present, as Chinese patent: CN202876595U " a kind of flexible anode wet type precipitator "; CN203061287U " a kind of flexible anode wet type precipitator of two-way water spray "; Its use method"; CN102872669A "a flexible anode wet dust collector with a hard grid layer"; CN204074267U "wet electric dust collector anode unit".

There are two types of wet dust collectors, flexible anode and rigid anode. The flexible anode is mainly based on the bag filter. The flexible anode is easy to be broken down by electricity, and the dust with high humidity is easy to stick to the surface of the anode and harden. Rigid anodes are mainly made of glass fiber reinforced plastics, and the structure is honeycomb or plate. The current rigid anodes have the disadvantages of large volume, heavy weight, inconvenient transportation and installation, easy corrosion, and low dust accumulation efficiency. The present invention uses semi-flexible and semi-rigid bamboo plywood materials for the shortcomings of the anode of the current wet dust collector. The anode is composed of several units. powerful.

Contents of the invention

In order to solve the problems of large volume, heavy weight, inconvenient transportation and installation, easy corrosion and low ash accumulation efficiency of the current wet electrostatic precipitator anode, the present invention provides a honeycomb bamboo plywood wet electrostatic precipitator anode.

The anode of the electrostatic precipitator includes an anode unit and a Y-shaped slot, and a plurality of anode units are fixed into a honeycomb shape through the Y-shaped slot.

The anode unit is bridge-shaped. An anode unit is folded from a piece of bamboo plywood. The angle between two adjacent sides is 120°. The width of the bamboo plywood is 10-100mm, the thickness is 0.2-3mm, and the length is 100-10000mm.

Among them, the surface of the bamboo plywood is coated with graphite powder or activated carbon powder for electrical conductivity. The particle size of graphite powder and activated carbon powder is less than 10 μm. Or the conductive inflection point of activated carbon powder, the conductivity is increased by 1.5 times. When the particle size continues to be reduced, although the electrical conductivity will increase, the cost will increase exponentially. Therefore, the particle size used in the present invention is 10 μm or less.

The three corners of the Y-shaped card slot are all 120-degree arcs, and the three sides of the card slot are equal in length, the side length is 1/20-1/2 of the width of the bamboo plywood, the thickness is 0.2-10mm, and the height is Wide 1/20-1/2, Y-shaped card slot made of titanium or stainless steel. When the outer angle of the Y-shaped card slot is a 120-degree arc, the inner angle of the honeycomb structure of the entire anode is actually changed from 120-degree angle to a 120-degree arc. This change not only avoids the problem of easy dust accumulation at the inner corner of the honeycomb structure , and make no dead angle appear when the anode plate is flushed, and the Y-shaped card slot can be used as a part of the anode, thereby enhancing the electric field strength. Through computer simulation and repeated tests, it is found that the introduction of the Y-shaped card slot can increase the electric field strength in the anode field by 1.2 times, and correspondingly increase the dust removal efficiency by 1.2 times.

The beneficial effects of above-mentioned technical scheme of the present invention are as follows:

The anode of a honeycomb-shaped bamboo plywood wet-type electric precipitator of the invention has high dust removal efficiency, corrosion resistance, convenient transportation and installation, is not prone to dust accumulation and dead spots for washing, and has high electric field strength. The main body of the anode of the dust remover of the present invention is a bamboo plywood, which can be recycled, fired into activated carbon and coated on the surface of a new bamboo plywood as a coating. The invention uses a Y-shaped slot to fix the anode unit. The Y-shaped slot uses a 0.2-10mm titanium plate or a 316L stainless steel plate, which has strong corrosion resistance. The Y-shaped slot can also be recycled, especially the titanium plate, which can be used infinitely. Recycling is in line with the national concept of circular economy.

The anode of the honeycomb bamboo plywood wet electrostatic precipitator selects the size and quantity of the anode units according to the flue gas conditions, and maximizes the side length of the anode units and reduces the number of anode units under the premise of ensuring the dust removal efficiency. The conductive substance of the present invention, that is, activated carbon powder or graphite powder, is evenly attached to the surface of the bamboo plywood by means of electroplating, coating or pressing, and the bamboo plywood is surface-treated before the conductive particles are attached to increase its surface area. , and it is easier to combine with conductive particles. After the surface treatment of the bamboo plywood is completed, the bamboo plywood is first pressed and folded into a bridge shape, and then conductive particles (activated carbon powder or graphite powder) are attached to the bamboo plywood. Because the anode is made of bamboo plywood, it has strong corrosion resistance, light weight, and low cost. The anode unit is bridge-shaped, so it is easy to transport and install. The anode unit of a honeycomb bamboo plywood wet electrostatic precipitator of the present invention is fixed and inserted together through a Y-shaped card slot, and the 120-degree arc angle of the Y-shaped card slot makes the anode of the present invention avoid the original hexagonal 120-degree angle It is easy to accumulate dust and not easy to wash. The Y-shaped card slot also enhances the electric field strength of the anode channel of the electrostatic precipitator, thereby increasing the dust accumulation and dust removal efficiency by 1.2 times. The anode of the invention is easy to install, and once a certain unit is damaged, it can be replaced independently at any time, which saves the cost of the anode of the dust collector. Moreover, the corrosion resistance and flue gas impact resistance of the present invention are superior to traditional honeycomb wet electrostatic precipitators.

Description of drawings

Fig. 1 is the structural representation of honeycomb bamboo plywood wet type electrostatic precipitator anode of the present invention;

Fig. 2 is a schematic diagram of the anode unit bridge structure of the present invention.

Among them: 1-anode unit; 2-Y-shaped card slot.

detailed description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

The invention provides a honeycomb bamboo plywood anode for a wet electrostatic precipitator aiming at the problems of the existing wet electrostatic precipitator anode, such as large volume, heavy weight, inconvenient transportation and installation, easy corrosion and low ash deposition efficiency.

As shown in FIG. 1 , it is a schematic structural diagram of the anode. The anode is fixed into a honeycomb shape by a plurality of anode units 1 through Y-shaped slots 2 . As shown in FIG. 2, the anode unit 1 of the anode is bridge-shaped.

In the present embodiment, 20 anode units are used to form 12 hexagons. The side length of the anode unit is that the width of the bamboo plywood is 50mm, the thickness is 1mm, and the length of the bamboo plywood is 1000mm; The thickness is 1.2mm, the height is 5mm, and it is made of stainless steel; the surface layer of the bamboo plywood is coated with activated carbon powder, and the average particle size of the activated carbon powder is 8μm. The central position of the anode channel of the electrostatic precipitator is provided with a thorn-shaped cathode line. The voltage selected in this embodiment is 50,000 volts, the inlet flue gas reaches saturated humidity, the dust content is 80 mg/Nm ³ , and the temperature is 65°C. The flow rate of the flue gas in the direction of the anode plate in the channel is 150mm/s, so the dust-containing flue gas completes the adsorption of dust particles on the electrode plate after 9s, and the clean flue gas is discharged from the bottom of the dust collector, and the discharged flue gas contains The dust content is 2.3mg/Nm ³ , after 24 hours, the dust content of the exhausted flue gas reaches 3mg/Nm ³ . Start the flushing device, flush for 8 minutes, the voltage drops to 00,000 volts during the flushing process, and the dust content of the outlet flue gas can reach 30mg/Nm ³ during the flushing process.

It can be seen from the above embodiments that the wet dust collector of the present invention has high dust removal efficiency and low energy consumption, and while meeting the dust removal rate, it reduces the load bearing burden of the dust collector support.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (4)

1. A honeycomb bamboo plywood wet-type electrostatic precipitator anode comprises an anode unit (1) and a Y-shaped draw-in groove (2), and a plurality of anode units (1) are fixed into honeycomb by the Y-shaped draw-in groove (2), It is characterized in that: the anode unit (1) is bridge-shaped, one anode unit (1) is a piece of bamboo plywood pressed and folded into a bridge-shaped structure with three sides, the angle between two adjacent sides is 120°, and the width of the bamboo plywood is The length is 10-100mm, the thickness is 0.2-3mm, and the length is 100-10000mm. 2. The anode of a honeycomb bamboo plywood wet-type electrostatic precipitator according to claim 1, characterized in that: the surface of the bamboo plywood constituting the anode unit (1) is coated with graphite powder or activated carbon powder. 3. The anode of a kind of honeycomb bamboo plywood wet-type electrostatic precipitator according to claim 1, is characterized in that: the three angles of the Y-shaped slot (2) are 120 degree arcs, and the three angles of the slot are 120 degrees. The sides are equal in length, the side length is 1/20-1/2 of the width of the bamboo plywood, the thickness is 0.2-10mm, and the height is 1/20-1/2 of the width of the bamboo plywood. The Y-shaped card slot (2) is made of metal Made of titanium or stainless steel. 4. The anode of a honeycomb bamboo plywood wet-type electrostatic precipitator according to claim 2, characterized in that: the particle size of the graphite powder and activated carbon powder is below 10 μm.