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Method and system for meeting catalytic temperature requirement of catalyst by utilizing boiler waste heat

A boiler waste heat and catalyst technology, which is applied to chemical instruments and methods, separation methods, and greenhouse gas reduction, can solve problems such as reducing furnace temperature and combustion efficiency, increasing moisture content in flue gas, and losing air permeability, etc., to achieve reasonable structure and realization The effect of waste heat utilization

Pending Publication Date: 2021-09-28
通化金山银山环保设备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Low temperature steam will reduce furnace temperature and combustion efficiency
The second is to increase the water content in the flue gas. The water vapor will wet the dust bag, and it will harden after being stained with ash, losing air permeability, and will also cause H2O poisoning of many catalysts.

Method used

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  • Method and system for meeting catalytic temperature requirement of catalyst by utilizing boiler waste heat
  • Method and system for meeting catalytic temperature requirement of catalyst by utilizing boiler waste heat
  • Method and system for meeting catalytic temperature requirement of catalyst by utilizing boiler waste heat

Examples

Experimental program
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Effect test

Embodiment 1

[0026] In this example, the waste heat of high-temperature exhaust gas and high-temperature slag is used to meet the temperature requirements of the catalytic oxidation of the catalyst.

[0027] see Figure 1-8 , the method of using boiler waste heat to meet the catalytic temperature requirements of the catalyst is to install the catalyst device after the dust removal and purification of the boiler flue gas and in front of the chimney, and raise the temperature of the semi-clean gas before entering the catalyst device to a suitable temperature (230°C-280°C ); the method of increasing the temperature of the semi-clean gas is: 1. Lead out the boiler slag to bake the semi-clean gas and set up the semi-clean gas pipeline; 2. Use the boiler exhaust gas to exchange heat for the semi-clean gas pipeline.

[0028] see figure 1 , is the rear view of the boiler. The method of using boiler waste heat to meet the catalytic temperature requirements of the catalyst is to build a hypotenuse...

Embodiment 2

[0037] In this example, high-temperature exhaust gas, high-temperature slag waste heat and boiler furnace heating are used to meet the catalytic oxidation temperature requirements of the catalyst.

[0038] Waste incineration and biomass boilers are different from coal-fired boilers. The amount of slag is relatively small, the temperature of the slag is relatively low, and the temperature of the waste gas is not very high. Although the high-temperature slag and high-temperature waste gas are fully utilized, there may be semi- The temperature of the clean gas cannot meet the temperature requirement of the catalytic oxidation of the catalyst, but the difference from the temperature requirement will not be too large. In order to further increase the temperature of the semi-clean gas before entering the catalyst, part of the semi-clean gas is introduced into the boiler furnace to be heated and passed through the boiler, and finally mixed with the semi-clean gas before entering the c...

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Abstract

The invention relates to the field of boiler smoke treatment, in particular to a method and system for meeting the catalytic temperature requirement of a catalyst by utilizing boiler waste heat. The method comprises the following steps: raising the temperature of semi-clean gas to a proper temperature before the semi-clean gas enters a catalyst device; the method for increasing the temperature of the semi-clean gas comprises the following steps: firstly, leading out boiler slag baking semi-clean gas and arranging a semi-clean gas pipeline; and secondly, reusing boiler waste gas for heat exchange of the semi-clean gas pipeline. According to the system, a bevel edge tunnel communicated with a boiler hearth is built below the tail of a boiler, and the boiler hearth is connected with a slag discharger; the bevel edge tunnel is connected with a square tunnel; a rotatable slag discharger and a boiler waste gas outlet are arranged at the tail end of the square tunnel; slag conveying fire grates are laid at the bottoms in the bevel edge tunnel and the square tunnel; a tubular semi-clean gas heat exchanger is mounted at the upper part in the bevel edge tunnel and the square tunnel; two ends of the heat exchanger penetrate through the bevel edge tunnel and the square tunnel. The flue gas participates in the catalytic oxidation reaction of the catalyst at a suitable and controllable temperature.

Description

technical field [0001] The invention relates to the field of boiler smoke treatment, that is, a method and a system for meeting the catalytic temperature requirements of catalysts by using boiler waste heat. Background technique [0002] In the prior art, boiler dedusting often removes dioxins produced by waste incineration boilers and toxic and harmful polycyclic aromatic hydrocarbons produced by biomass boilers through catalysts. However, there is a requirement for the temperature of the flue dust entering the catalyst, usually at 230-280°C, and the treated flue gas sometimes fails to meet this requirement. The utilization of waste heat from boiler high-temperature exhaust gas and boiler high-temperature slag is very common, but there is no report on the integrated waste heat utilization of high-temperature exhaust gas and high-temperature slag, especially in the comprehensive application of catalytic reactions. The current slag discharge must be water quenched first, oth...

Claims

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Application Information

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IPC IPC(8): B01D53/86F23J15/02F23J15/06
CPCB01D53/86F23J15/022F23J15/06Y02E20/30
Inventor 霍晓光霍成斌
Owner 通化金山银山环保设备制造有限公司