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Ultrafine particle based on high-temperature-resistance titanium-based adsorbent and heavy-metal combined removal method

An ultra-fine particle, combined removal technology, applied in separation methods, chemical instruments and methods, fuel additives, etc., can solve the problems of not fully meeting the requirements of use, small operating temperature range, limited emission reduction effect, etc. Large-scale industrial production, low price, and the effect of reducing particulate emissions

Inactive Publication Date: 2015-03-11
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned coal-fired adsorbents that have been developed so far are easily deactivated in high-temperature environments, resulting in limited overall emission reduction effects.
The operating temperature range is small, and it is often only suitable for medium and low temperature environments, which cannot fully meet the requirements of use

Method used

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  • Ultrafine particle based on high-temperature-resistance titanium-based adsorbent and heavy-metal combined removal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Select industrial titanium dioxide products, TiO 2 The mass content is 95%, and the impurity component is mainly Al 2 o 3 . The particle size is concentrated at 15 μm. According to the mass ratio of 3%, it is fully mixed with pulverized coal (particle size 60 μm), and the combustion experiment is carried out at 1500 ° C in the laboratory settling furnace (DTF) to simulate the combustion process of the pulverized coal boiler. The low-pressure impact particle sampler (LPI) and load-bearing particle sampler (DGI) were used to collect and analyze the generation of fine particles PM2.5 and ultrafine particles PM0.5 and the content of heavy metals. removal effect such as figure 1 As shown, the generation of fine particulate matter PM2.5 was reduced by 26%, and the generation of ultrafine particulate matter was reduced by 42%.

Embodiment 2

[0030] The titanium dioxide product described in Example 1 and the kaolin powder reagent were mixed in a mass ratio of 6:4 and mechanically mixed uniformly to prepare a titanium-based particulate adsorbent added with clay minerals. An appropriate amount of the prepared titanium-based particulate adsorbent was fully mixed with coal powder (particle size 60 μm) at a mass ratio of 3%, and a combustion experiment was carried out in a laboratory settling furnace (DTF) at 1500 °C to simulate the combustion process of a pulverized coal boiler. The low-pressure impact particle sampler (LPI) and load-bearing particle sampler (DGI) were used to collect and analyze the generation of fine particles PM2.5 and ultrafine particles PM0.5 and the content of heavy metals. removal effect such as figure 1 As shown, the generation of fine particulate matter PM2.5 was reduced by 43%, and the generation of ultrafine particulate matter was reduced by 52%.

Embodiment 3

[0032] The titanium dioxide described in Example 1 was used to carry out the control experiment of particulate matter added in the furnace on the industrial pulverized coal boiler. A titanium-based particulate adsorbent is added to the furnace through the primary air duct, and the ratio of the adsorbent to the pulverized coal (particle size: 60 μm) is 3% by mass. Compared with the operating condition without adding adsorbents, the concentration of particulate matter at the furnace outlet is reduced after adding Ti-based adsorbents. With the combined effect of the tail electrostatic precipitator, the concentration of particulate matter emissions has dropped significantly, meeting the national emission standards.

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Abstract

The invention discloses an ultrafine particle based on a high-temperature-resistance titanium-based adsorbent and a heavy-metal combined removal method. A titanium-based adsorbent is taken to be mixed with a fuel, the titanium-based adsorbent and the fuel are sprayed to a combustion chamber to be combusted, and the titanium-based adsorbent catches ultrafine particles, fin particles, particle type gas precursor contaminants and heavy metals. The titanium-based adsorbent comprises 50-100 percent by weight of main active component and 0-50 percent by weight of secondary active component, wherein the main active component is titanium dioxide (TiO2), and the secondary active component comprises one or more than two of clay mineral, metallic oxide and carbonate. According to the heavy-metal combined removal method, the high-temperature-resistance titanium-based adsorbent is used for catching ultrafine particles and heavy metals in smoke, and the thermal adaptability of the titanium-based adsorbent is strong; the titanium-based adsorbent excellently exerts the functions at low, middle and high temperatures, and can reduce the ultrafine particles, the fine particles, the particle type gas precursor contaminants and the heavy metals during combustion.

Description

technical field [0001] The invention belongs to combustion pollutant control technology, and in particular relates to a method for combined removal of ultrafine particles and heavy metals based on a high-temperature-resistant titanium-based adsorbent. Background technique [0002] In recent years, the frequency of severe smog weather has increased sharply, which has aroused widespread concern from the government and the general government on particulate matter pollution. Fine particulate matter PM2.5 and ultrafine particulate matter PM0.5 are important components of atmospheric particulate matter. Due to their small particle size and large specific surface area, they are often enriched with various toxic trace elements and germs, and they are easy to break through the filtering effect of the respiratory tract. Deep into the human body, it will cause various damages to the respiratory system, cardiovascular system and nervous system of humans and animals. Western developed c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D49/00B01D53/06B01D47/06B01D53/14C10L10/00C10L10/02
Inventor 盘思伟刘亚明李丽刘小伟徐义书
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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