CN101664638A

CN101664638A - Integrated device of electrocatalysis-adsorption, desulfurization, denitration, dust removal and heavy metal removal of fuel gas

Info

Publication number: CN101664638A
Application number: CN200810119310A
Authority: CN
Inventors: 赖志勤
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-03
Filing date: 2008-09-03
Publication date: 2010-03-10

Abstract

The invention relates to the technical field of a technique for desulfurization and denitration of a fuel gas, and provides an integrated device of electrocatalysis-adsorption, desulfurization, denitration, dust removal and heavy metal removal of the fuel gas. The integrated device mainly comprises a catalytic-adsorbent bed (2), electrode bars (1 and 3), a water spray pipe (4), a discharge flue (5), a water distribution baffle (6), an inlet flue (7), an acid water valve (8) and the like. The device quickly removes SO2, NOx and the like in the fuel gas by using an electrostatic field electrodepair consisting of the electrode bar (1), the electrode bar (3) and the catalytic-adsorbent bed (2), and strengthening the adsorption and desorption capacities of a catalytic adsorbent by an electrostatic field. The device has strong desulfurization and denitration capacities, and can simultaneously remove dust and heavy metals without generating secondary pollutants.

Description

Fuel gas electro-catalysis, adsorptive desulfurization denitration dust and heavy metal removal integrated apparatus

The related technical field of this case is the flue gas desulfurization and denitrification technology.

-existing flue gas desulfurization and denitrification technology has multiple, and absorption method wherein is to develop method faster both at home and abroad.Its major technique characteristics are to use materials such as activated carbon, activated coke, do matrix; Supported catalyst is prepared into the adsoption catalysis material again.When flue gas by time absorption sour gas such as Nox, SO2 wherein, can also deviate from some dusts, heavy metal simultaneously.After adsoption catalyst is saturated, desorb again; Circulation makes gas cleaning repeatedly.Do not produce secondary pollution.

Above-mentioned absorption method technology has a lot of weak points: 1, sorbing material is bulky, and adsorption rate is slow.Pressure reduction when 2, flue gas is by adsorbent bed is big, the energy consumption height.3, the continuous desorption and regeneration of sorbing material demand, the sorbing material loss is big.4, desorption system complexity, operating cost is high.The application of this kind method in the system for desulfuration and denitration of big exhaust gas volumn is very restricted.

The purpose of this case provides a kind of fuel gas electro-catalysis, adsorptive desulfurization denitration dust and heavy metal removal integrated apparatus, so that solve some shortcomings in the absorption method.

Reference:

Activated carbon: 2006,3 environmental protection for electric power: 2007,2

Thermal power generation: 2005,6 environmental sciences and technology: 2004,6

Chinese patent: 1457920

The drawing explanation

Figure is the profile of device

1-electrode bar, 2-A group or B group catalyst-sorbent bed, 3-electrode bar 4-sparge pipe, 5-smokejack, 6-water distribution dividing plate, 7-flue, 8-sour water valve among the figure

Electrode bar among the figure (1) below A group/B group catalyst-sorbent bed (2), Electrode bar (3) is among A group/B group catalyst-sorbent bed (2), with electrode bar (1) consists of positive and negative stationary electrode pair; Sparge pipe (4) is at A group/B group catalytic adsorption Above the agent bed (2), water distribution dividing plate (6) is with A group and B group catalyst-sorbent Bed (2) separates, and consists of the individual from the space of A group/B group catalyst-sorbent bed (2); Flue (7) is organized the catalyst-sorbent bed in A group and B respectively with smokejack (6) (2) there is sour water valve (8) both sides under the flue (7).

With reference to the drawing explanation, further specify the operation principle of this case. When flue gas from flue (7) in the access to plant, smoke distribution is organized under the catalyst-sorbent bed (2) to A group/B, The high-voltage electrostatic field that electrode bar (1) by electronegative property consists of, in the flue gas The electronegative property such as SO2, Nox, O2, H2O; Electrode bar (3) by positively charged When the high-voltage electrostatic field that consists of is A group and B group catalyst-sorbent bed (2), quilt Oxidation-reduction reaction takes place in electric field+catalyst-sorbent absorption simultaneously. SO2+ (O2)+H2O-H2SO4 Nox+ (O2)+H2O-HNO3 Make in the flue gas SO2 NO etc. remove, the flue gas after the purification is discharged from smokejack (5).

After A group catalyst-sorbent bed (2) is saturated, its electrode bar (1) and (3) Static polarity exchange; Electrode bar (1) positively charged, electrode bar (3) is electronegative The property. Sparge pipe this moment (4) water spray adsorbs in the A group catalyst-sorbent bed (2) H2SO4, HNO3 etc. are with the material of polarity, under the effect of electrostatic field, fast from urging Desorb out in the change adsorbent, catalyst-sorbent is purified, enter next time circulation. Contain Acid waste water flows down along water distribution baffle plate (6), and with the hot flue gas exchange of rising, sour water is further After concentrating, discharge through sour water valve (8). A group catalytic adsorption bed (2) is complete like this Become the circulation of an absorption-desorption.

In like manner, by B group catalyst-sorbent bed (2), electrode bar (1), (3) and spray The electric field that water pipe (4) consists of+catalyst-sorbent bed, the SO2 in the absorption flue gas, The adsorption and desorption process of the materials such as Nox is with A group catalyst-sorbent bed (2) phase With. So iterative cycles is purified flue gas.

Electrostatic potential is 3000-20000V between electrode bar (1), (3), Electrostatic potential can be regulated and control according to flow and SO2, the NOx equal size of flue gas, with Reach best clean-up effect.

The advantage of this case: 1, the saturated and regenerative process of catalyst-sorbent, just can circulate in position.2, electrostatic field+catalyst-sorbent to SO2 the OR speed of catalysis absorption of Nox etc. fast.3, device if regulation and control just can solve in the flue gas SO2 Nox content suddenly change, make the problem of clean-up effect difference.

Embodiment: the structure according to this case has prepared a model machine, treating capacity 100 cubic meters/hour, SO2 content 1200mg/ cubic meter in the flue gas, Nox contains the 600mg/ cubic meter.Removal efficiency is 98% to have reached designing requirement.

Claims

1, a kind of fuel gas electro-catalysis, adsorptive desulfurization denitration dust and heavy metal removal integrated apparatus, it is characterized in that: in A group or the B group catalyst-sorbent bed (2) electrode bar (3) is arranged, under the bed electrode bar (1) is arranged, sparge pipe (4) is in the A group or above the B group catalyst-sorbent bed (2); A is organized water distribution baffle plate (6) or B group catalyst-sorbent bed (2) separates, and constitutes envelope space relatively, and smokejack (5) and flue (7) are respectively in the both sides of catalyst-sorbent bed (2), and sour water valve (8) is arranged at flue (7) bottom.

2, according to claim (1), a kind of fuel gas electro-catalysis, adsorptive desulfurization denitration dust and heavy metal removal integrated apparatus is characterized in that: the electrode bar (1) under catalyst-sorbent bed (2) and electrode bar wherein (3), the bed constitutes an electrostatic field electrode pair, the polarity of electrode bar can be changed by job requirement, and its operating voltage is 3000-20000V.