A full-process low-temperature dry advanced treatment system for waste heat treatment flue gas

A full-process, flue gas technology, applied in gas treatment, separation methods, air quality improvement, etc., can solve the problems of low-temperature treatment of pollutants, ineffective treatment, complex unit combination, etc., to achieve stable and reliable operation, reduce The effect of high discharge efficiency, simple process and easy control

Active Publication Date: 2022-01-28
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing dry treatment process has the following deficiencies: in terms of process design, it is composed of simple series of technical units, and the unit combination is too complicated; in terms of treatment efficiency, the efficiency of low-temperature treatment of pollutants is low, and CO has not been effectively treated

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  • A full-process low-temperature dry advanced treatment system for waste heat treatment flue gas

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Effect test

Embodiment 1

[0030] The flue gas temperature of the present invention is 600°C, and the initial concentration of pollutants is CO 3000mg / m 3 、NOx 300mg / m 3 , SO 2 600mg / m 3 、HCl 50mg / m 3 , dioxins 0.2ng TEQ / m 3 、VOCs 50mg / m 3 , particles 150mg / m 3 , heavy metal 20mg / m 3 The waste incinerator flue gas passes through the indirect cold and hot circulation system, dry deacidification tower, dry adsorption tower, bag filter, and low-temperature vulcanization-catalytic tower in sequence. After the flue gas passes through the indirect cooling and heating cycle system, the temperature of the flue gas is lowered to 200°C, and the Ca(OH) content of the flue gas in the dry deacidification tower after cooling 2 After the reaction, it enters the dry adsorption tower, and the flue gas adsorbed and purified by the titanium-based adsorbent enters the low-temperature vulcanization-catalytic tower, and the temperature in the tower is 270°C. 2 Acidified monolithic honeycomb catalyst reaction, the em...

Embodiment 2

[0032] The temperature of the flue gas introduced in the present invention is 500°C, and the initial concentration of pollutants is CO 1000mg / m 3 、NOx 250mg / m 3 , SO 2 400mg / m 3 、HCl 50mg / m 3 , Dioxins 0.1ng TEQ / m 3 、VOCs 60mg / m 3 , particles 200mg / m 3 , heavy metal 25mg / m 3 The waste pyrolysis furnace flue gas passes through the indirect cold and hot cycle system, dry deacidification tower, dry adsorption tower, bag filter, and low-temperature vulcanization-catalytic tower in sequence. After the flue gas passes through the indirect cooling and heating cycle system, the temperature of the flue gas is lowered to 170°C. After cooling, the flue gas enters the dry adsorption tower after the CaO reaction in the dry deacidification tower, and the flue gas after adsorption and purification by activated carbon enters the low-temperature vulcanization-catalysis In the tower, the pollutants and Fe-Ce / ZrO at a temperature of 260°C 2 Acidified strip catalyst reaction, the emissio...

Embodiment 3

[0034] The flue gas temperature of the present invention is 550°C, and the initial concentration of pollutants is CO 5000mg / m 3 、NOx 350mg / m 3 , SO 2 570mg / m 3 、HCl 40mg / m 3 , Dioxins 0.17ng TEQ / m 3 、VOCs 35mg / m 3 , particles 250mg / m 3 , heavy metal 15mg / m 3 The waste gasification furnace flue gas passes through the indirect cold and hot cycle system, dry deacidification tower, dry adsorption tower, bag filter, and low-temperature vulcanization-catalytic tower in sequence. After the flue gas passes through the indirect cooling and heating cycle system, the temperature of the flue gas is lowered to 190°C. After cooling, the flue gas enters the dry adsorption tower after the reaction of MgO in the dry deacidification tower, and the flue gas after adsorption and purification by molecular sieves enters the low-temperature vulcanization-catalysis In the tower, the temperature in the tower is 280°C and the pollutants and Cu / Al 2 o 3 Acidified plate catalyst reaction, the e...

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Abstract

The invention discloses a low-temperature dry deep treatment system for the whole process of waste heat treatment flue gas. The system is designed according to the characteristics of waste heat treatment flue gas. unit, low temperature vulcanization-catalytic tower and other units. In the process of treatment, energy is recycled, pollutants are treated with waste, and the treatment functions are interlocking. At low temperature (250-280°C), the particulate matter, NOx, CO, and SO in the flue gas are deeply purified. 2 , VOCs, HCl, heavy metals and dioxins, with a purification rate of over 95%, meeting the requirements of ultra-low emission standards. The system has the advantages of no waste water, low energy consumption, low investment cost, stable and reliable operation, high emission reduction efficiency, simple and easy-to-control process, etc. It is suitable for advanced treatment of heat treatment flue gas such as waste incineration, pyrolysis, and gasification.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, and in particular relates to a whole-process low-temperature dry deep treatment system for waste heat treatment flue gas. Background technique [0002] Garbage heat treatment is to use the calorific value of garbage to make garbage harmless through incineration, pyrolysis, gasification and other methods. Due to the complex composition of the waste, a large amount of smoke, NOx, and SO are produced during the heat treatment process. 2 , CO, HCl, VOCs, dioxins and heavy metals and other pollutants. At present, most of the pollutants in heat treatment flue gas have relatively mature treatment technologies. Particulate matter shall be treated by bag filter according to regulations (CJJ90-2009); SO 2 There are wet, semi-dry and dry methods for the treatment of acid gases such as HCl and HCl. Compared with wet and semi-dry methods, the removal rate of dry deacidification is lower, but ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/75B01D53/86B01D53/50B01D46/02B01D46/04B01D53/04B01D53/60B01D53/56B01D53/62B01D53/64B01D53/68B01D53/70B01D53/44
CPCB01D53/75B01D53/8625B01D53/8637B01D53/8609B01D53/864B01D53/8687B01D53/04B01D46/02B01D46/023B01D46/04B01D53/68B01D53/508B01D2253/102B01D2258/0291B01D2257/302B01D2257/404B01D2257/708B01D2257/2064B01D2257/60B01D2257/502B01D2251/404B01D2251/402B01D2251/604B01D2251/602B01D2255/2065B01D2255/2073B01D2255/20738B01D2255/20761B01D2255/2092B01D2255/20715B01D2255/20707Y02A50/20
Inventor 陈雄波刘莹岑超平方平陈定盛谭玉菲陆鹏陈冬瑶石小霞
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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