What factors should be considered when choosing an incinerator dust collector for a waste incineration plant? Which materials have better corrosion resistance?

When choosing an incinerator dust collector for a waste incineration plant, the following factors need to be considered comprehensively:

I、 Dust removal efficiency

This is the primary consideration factor. The smoke generated by garbage incineration contains a large amount of particulate matter, which, if not effectively removed, can cause serious pollution to the environment.

1. Understand the dust removal efficiency range of different types of dust collectors. For example, bag filters have a good removal effect on fine particles and can achieve high dust removal efficiency; The electrostatic precipitator has a good capture effect on larger particles and particles within a specific particle size range.

2. Determine the required dust removal efficiency level based on the emission standards and actual needs of the waste incineration plant. Strict environmental requirements may require higher dust removal efficiency to ensure that the emitted flue gas meets national and local environmental standards.

II、 High temperature resistance performance

The flue gas temperature at the outlet of the garbage incinerator is usually high, usually between 150 ℃ -250 ℃ or even higher.

1.The filter material and structure of the dust collector must be able to withstand the long-term effects of high-temperature flue gas without deformation, damage, or reduced performance. For example, choosing high-temperature resistant filter materials such as PTFE, P84 and other materials for cloth bags, or using high-temperature resistant steel to make the shell and components of dust collectors.

2. Consider the operational stability of the dust collector in high-temperature environments to avoid equipment failures or shutdowns caused by high temperatures, which may affect the normal operation of the waste incineration plant.

III、 Corrosion resistance performance

The flue gas from garbage incineration contains various corrosive components, such as sulfur dioxide, hydrogen chloride, nitrogen oxides, etc.

1. The material of the dust collector should have good corrosion resistance to prevent corrosion by corrosive substances in the flue gas. For example, using corrosion-resistant stainless steel material or undergoing special anti-corrosion treatment.

2.When selecting filter materials, consideration should be given to their durability in corrosive environments. Some special filter materials, such as Flumes, have good corrosion resistance and can adapt to the harsh environment of waste incineration flue gas.

IV、 Resistance characteristics

The resistance of the dust collector directly affects the energy consumption of the waste incineration system.

1. Low resistance dust collectors can reduce the energy consumption of fans and lower operating costs. When choosing a dust collector, attention should be paid to its resistance coefficient and comprehensive consideration should be given to the selection of fans for waste incineration plants.

2. Consider the resistance changes of the dust collector during operation to avoid a sharp increase in resistance caused by dust accumulation and other reasons, which may affect the normal operation of the system.

V、 Cleaning method

An effective dust cleaning method can ensure the continuous and stable operation of the dust collector.

1. Common dust cleaning methods include pulse blowing, reverse blowing, mechanical vibration, etc. Different cleaning methods are suitable for different types of dust collectors and operating conditions. For example, bag filters usually use pulse jet cleaning, which has the advantages of good cleaning effect and high degree of automation.

2. Consider factors such as the reliability of the cleaning method, cleaning intensity, and cleaning cycle. A short cleaning cycle will increase energy consumption and equipment wear, while a long one will affect dust removal efficiency.

VI、 Equipment size and installation space

The space of the garbage incineration plant is limited, and it is necessary to choose a suitable size of dust collector.

1. Choose a compact and small footprint dust collector based on the layout and space constraints of the waste incineration plant. For example, some new compact dust collectors can achieve efficient dust removal in limited spaces.

2. Consider the installation method of the dust collector and its connection with other equipment to ensure a smooth installation process without affecting the normal production of the waste incineration plant.

VII、 Maintenance cost and service life

1. Evaluate the maintenance needs and costs of the dust collector, including filter bag replacement, equipment maintenance, and maintenance of the dust cleaning system. Choosing dust collectors with lower maintenance costs and longer service life can reduce the operating costs of waste incineration plants.

2. Understand the after-sales service and technical support of the dust collector manufacturer to ensure timely resolution of equipment problems.

VIII、 Investment cost

Garbage incineration plants need to control equipment investment costs while meeting environmental protection requirements and production needs.

1. Conduct cost analysis on different types of dust collectors, including equipment purchase costs, installation costs, operating costs, etc. Taking into account cost-effectiveness, choose the most suitable dust collector.

2. Some energy-saving dust collectors can be considered or investment costs can be reduced through optimized design, but at the same time, the performance and quality of the equipment should not be affected.

In the dust collector of the incinerator in the garbage incineration plant, the following materials have good corrosion resistance:

I、 PTFE (polytetrafluoroethylene)

1. Excellent chemical stability: PTFE has extremely excellent acid and alkali resistance, corrosion resistance, and can resist almost all chemical substances. In the flue gas environment containing corrosive components such as sulfur dioxide, hydrogen chloride, and nitrogen oxides generated by garbage incineration, PTFE exhibits extremely high stability and will not be corroded or damaged.

2. Wide temperature adaptability: It can be used for a long time within the range of -180 ℃ to 260 ℃, and can adapt well to the high-temperature flue gas at the outlet of the garbage incinerator, while still maintaining good corrosion resistance at high temperatures.

3. Non stickiness: The surface free energy is very low and has a high degree of non adhesiveness. Dust is not easily attached to the surface of the filter material, which is not only beneficial for cleaning, but also reduces the accumulation of corrosive substances on the surface, further reducing the risk of corrosion.

II、 P84 (polyamide fiber)

1. Good corrosion resistance: It has certain resistance to hydrolysis and oxidation, and has good resistance to corrosive components in waste incineration flue gas. Can be used in pH 2-12 environments and adapt to the acidic and alkaline environment of waste incineration flue gas.

2. High temperature resistance and auxiliary corrosion resistance: The temperature resistance can reach 260 ℃ to 300 ℃. In high temperature environments, its structure is relatively stable and not easily corroded. Meanwhile, high temperature also helps to reduce the condensation and adsorption of certain corrosive substances on the surface of the filter material, thereby reducing the possibility of corrosion.

III、 Flumes (FMS)

1. Comprehensive corrosion resistance: It has the characteristics of high temperature resistance, high strength, acid and alkali corrosion resistance, wear resistance, and folding resistance. Through different surface chemical treatment techniques, it can also have functions such as easy dust removal, waterproofing, oil resistance, anti-static, etc., further enhancing its corrosion resistance in complex environments.

2. Material characteristics: Corrosion resistance: Compared with glass fiber filter media, its wear resistance, folding resistance, and peel strength are significantly improved. In the harsh environment of garbage incineration flue gas, it can better resist the combined effects of corrosive substances and mechanical wear.

IV、 High silica filter material

1. Certain corrosion resistance advantages: Normal temperature resistance can reach 160 ℃, and the instantaneous maximum temperature can reach 200 ℃, with good stability in high temperature environments. After film coating treatment, surface filtration can be achieved, reducing the possibility of dust forming a powder layer on the surface of the filter bag and then solidifying, reducing the contact area and time between corrosive substances and filter media, thereby improving corrosion resistance.

2. Special structure enhances resistance: The special structure of high silica filter material enables it to resist corrosive components in waste incineration flue gas to a certain extent, extending the service life of the filter material.