Thermal desorption method and device for activated carbon

A technology of activated carbon and thermal analysis, which is applied in separation methods, chemical instruments and methods, and other chemical processes, and can solve problems such as loss of heat energy

Active Publication Date: 2016-06-22
HUNAN ZHONGYE CHANGTIAN ENERGY CONSERVATION & ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] Therefore, if the hot air at about 320°C and the cooling air at about 120°C are directly discharged, a large amount of heat energy will be lost.

Method used

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  • Thermal desorption method and device for activated carbon
  • Thermal desorption method and device for activated carbon
  • Thermal desorption method and device for activated carbon

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Experimental program
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Effect test

Embodiment approach

[0183] In addition, according to the first embodiment of the present invention, there is also provided a thermal analysis method comprising activated carbon utilizing waste heat utilizing the above-mentioned device, the method comprising the following steps:

[0184] 1) In the activated carbon adsorption tower of the desulfurization and denitrification device, the activated carbon that has adsorbed pollutants including sulfur oxides, nitrogen oxides and dioxins from the sintering flue gas is transferred from the bottom of the adsorption tower to the activated carbon analysis tower. In the heating zone, wherein the desulfurization and denitrification devices include an activated carbon adsorption tower and a desorption tower, and wherein the desorption tower (or regeneration tower) has an upper heating zone and a lower cooling zone;

[0185] 2) Blast furnace gas or coke oven gas (optionally after being preheated by flowing through a gas heat exchanger) is delivered to the heatin...

Embodiment 1

[0210] Such as Figure 5 Shown in, desulfurization, denitrification device comprises activated carbon adsorption tower (20) (tower height 30 meters, cross-sectional area 120m 2 ) and analytical tower (as shown in Figure 2, the tower is 20 meters high and the cross-sectional area is 15m 2 ). The tower body of activated carbon adsorption tower (see Figure 8 ) has a multi-layered chamber structure parallel to each other in the vertical direction, that is, the left air outlet chamber B ← denitration chamber c ← desulfurization, denitration chamber b ← desulfurization chamber a ← intake chamber A → desulfurization chamber a → desulfurization, denitration Chamber b → denitrification chamber c → right outlet chamber B, in which the flue gas flows from the inner air inlet chamber A substantially horizontally outward along the left and right directions (to the B outlet chamber). For drawing convenience, Figure 5 The reaction tower (or adsorption tower) in is described as a single...

Embodiment 2

[0220] Repeat embodiment 1, just, wherein: all of the hot blast G1 ' that is exhausted from the hot blast outlet of the heating zone of desorption tower is divided into two hot blast airflows, i.e. the first hot blast airflow and the second hot blast airflow, both according to 15: The volume ratio or flow ratio of 85, wherein the first hot air flow (about 300°C) (accounting for 15vol% of the total external hot air volume or flow) is sent to the gas heat exchanger (11) upstream of the heating furnace (6) It is used to preheat the coke oven gas, and the second hot air flow (about 300°C) is sent to the temperature regulation zone (or mixing, buffer zone) at the end of the heating furnace (6) and discharged from the combustion chamber and enters the temperature regulation zone. The high-temperature hot air (G0) (about 1900°C) in the zone is mixed to adjust the temperature to 415-420°C, thus forming the hot air (G1) of the mixture, and the hot air (G1) is transported to the heating ...

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Abstract

A thermal desorption method including waste heat utilization for activated carbon is disclosed. The method includes adsorbing sulfur oxides, nitrogen oxides and other pollutants through activated carbon in an activated carbon adsorption tower of a desulphurization and denitration device, allowing blast furnace gas or coke oven gas to flow through a gas heat exchanger to preheat the blast furnace gas or the coke oven gas, conveying the blast furnace gas or the coke oven gas to a combustion chamber of a heating furnace, combusting, allowing high-temperature hot wind G0 discharged from the combustion chamber to flow through a temperature adjusting zone at the tail of the heating furnace to adjust the temperature so that the high-temperature hot wind turns into cooled hot wind G1, conveying the G1 to a heating zone of a desorption column, desorbing the activated carbon through the hot wind G1, discharging hot wind G1' which is further cooled from the heating zone, and applying a part of the hot wind G1' to preheat the blast furnace gas or the coke oven gas in the gas heat exchanger. One part of cooling wind G2' discharged from a cooling zone of the desorption column is adopted for heating nitrogen adopted as a gas carrier and / or for evaporating acid preparing wastewater. A desorption device for the activated carbon is also provided.

Description

technical field [0001] The present invention relates to the thermal analysis method and the device thereof that comprise the activated carbon that waste heat is used for preheating nitrogen, more particularly, the present invention relates to comprise activated carbon adsorption tower and desorption tower (or regeneration tower) dry desulfurization, denitrification device from The method that the heating gas (such as air or hot air) output from the analysis tower is used to heat the nitrogen carrier gas so as to realize the recovery and utilization of waste heat belongs to the field of sintering flue gas treatment. Background technique [0002] For industrial flue gas, especially sintering machine flue gas in the iron and steel industry, it is ideal to use desulfurization and denitrification devices and processes including activated carbon adsorption towers and desorption towers. In the desulfurization and denitrification devices including activated carbon adsorption tower a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/20B01D53/04
Inventor 刘旭华叶恒棣李勇刘昌齐钮心洁陈红颜学宏黄伏根杨东魏进超
Owner HUNAN ZHONGYE CHANGTIAN ENERGY CONSERVATION & ENVIRONMENTAL PROTECTION TECH CO LTD
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