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Introduction to the cleaning performance of cyanide, chromium, ammonia, acid, NOX, H2s exhaust gas purification

Views:8     Author:Xicheng     Publish Time: 2021-10-23      Origin:Xicheng

It has a good purification treatment effect for various corrosive gases, and can effectively remove hydrogen chloride gas (HCl), hydrogen fluoride gas (HF), ammonia (NH3), sulfuric acid mist (H2SO4), chromic acid mist (CrO3), hydrogen cyanide gas ( HCN), alkali vapor (NaOH), hydrogen sulfide gas (H2S), formalin (HCHO) and other water-soluble gases. The scrubber tower has high purification efficiency, simple operation and management, and long service life. For different chemical gases, wet scrubbers have different performance specifications.


Table of performance specification parameters

device
model
size
(mm)
design air
volume (m3/h)
Fan Power
(KW)
Full
pressure (Pa)
Circulating
fluid pump (N-KW)
Circulating
fluid pump (Q-m3/h)
Circulating
fluid pump (H-m)
BHF/650Φ650×H300015001.12901.16.315-20
BHF/800Φ800×H310030001.13901.512.515-20
BHF/1000Φ1000×H360060002.24902.21515-20
BHF/1200Φ1200×H390075004.080042520-25
BHF/1400Φ1400×H4200100005.5120043020-25
BHF/1600Φ1600×H4200150007.58005.53520-25
BHF/2000Φ2000×H450020000111000116025-30
BHF/2400Φ2400×H480024000151000118025-30
BHF/3000Φ3000×H48003000018.56001510025-30
cyanide-containing exhaust gasdesign flow rates0.3-0.6m/sresidence time8-10m/ssingle-stage purification efficiency95-97%25-32℃
contains chromium exhaust gasdesign flow rates0.3-0.6m/sresidence time9-12m/ssingle-stage purification efficiency92-95%25-32℃
contains ammonia exhaust gasdesign flow rates0.3-0.6m/sresidence time8-10m/ssingle-stage purification efficiency95-98%25-32℃
contains acid mist exhaust gasdesign flow rates1m/sresidence time5-6m/ssingle-stage purification efficiency95-97%25-32℃
CONTAINS NOX EXHAUST GASdesign flow rates0.3-0.6m/sresidence time8-10m/ssingle-stage purification efficiency95-96%25-32℃
Contains H2s, exhaust gasdesign flow rates0.3-0.6m/sresidence time8-10m/ssingle-stage purification efficiency92-97%25-32℃
the device materialQ235 PLUS LINED FRP, Q235 PLUS LINED NATURAL SILICONE-FREE SEMI-HARD RUBBER, PP, FRP, SS304, SS316L
wash and spray liquidNaOH liquid, tap water.
operating temperatureit is suitable for 0-50 degrees c, and it is recommended to be around 25 degrees c.
the depth of the filter layer400-600mm, standard 500mm.


How it works The working principle
of exhaust gas treatment equipment is to separate the pollutants in the gas and convert them into harmless substances in order to purify the gas. It belongs to the differential contact countercurrent type, the filling material in the tower body is the basic component of the two-phase contact of the gas liquid. When the gas outside the tower enters the tower, Gas into the filler layer, the filler layer from the top of the spray liquid and the front spray liquid, and the formation of a layer of liquid film on the filler, gas flow through the filler gap, contact with the filler liquid film and absorption or neutral reaction, the filler layer can provide a large enough surface area, the flow of gas does not cause excessive resistance, after absorption or neutralized gas by the demister collection, through the air outlet outside the tower. Absorbent is the main medium for the treatment of exhaust gases, its nature and concentration are selected according to the nature of different exhaust gases, and the consumption of treated unit gases is determined by calculating the ratio of the molar flow of the absorbent to the inert gas. The exhaust gas is drawn from the fan from the duct and passes through the filling layer from the bottom up, and the circulating absorbent is sprayed evenly into the filler layer by the top of the tower through the liquid distributor, flowing down the surface of the filler layer and into the circulating water tank. As the upflow and the decreasing absorbent are constantly in contact in the filler, the concentration of fluid in the rising air flow is getting lower and lower, and the emission requirements are met by reaching the top of the tower. The liquid on the liquid film flows into the reservoir under gravity and is pumped out by the circulating pump.

The calculation of the evaporation of liquid (except water) This calculation method is applicable to the calculation

of acid evaporation in the acid washing process such as sulfuric acid, nitric acid, hydrochloric acid, etc., and the calculation formula is as follows: GZ-M (0.000 352-0.000 768V)P.F


in formula, GZ - liquid evaporation,kg/h;


M- liquid molecular weight; V - evaporation liquid surface air flow rate, m/s, based on measured data, unconditional measurement, generally desirable 0.2-0.5;


P - corresponding to the air at liquid temperature vapor pressure, mmHg. When the liquid concentration (weight)

is less than 10%, F-liquid evaporation surface surface area, radon.
5.1 Table 1-1 of the Manual of Environmental Statistics
Water vapor and HCl gas separation pressure (mmHg) on the surface of the HCl aqueous solution
concentration
%
temperature (c)temperature (c)temperature (c)temperature (c)temperature (c)temperature (c)
01520253040
PHClPH2OPHClPH2OPHClPH2OPHClPH2OPHClPH2OPHClPH2O
100.03.840.00210.70.00414.60.007200.01126.800.02847
140.03.390.0129.650.01913.10.032180.05024.10.1242.1
180.02.870.068.260.09511.30.14815.40.22820.60.5236.4
220.072.330.2946.750.459.30.6812.61.0217.102.1030.2
260.411.761.475.212.177.213.209.954.5613.509.2024.0
281.01.503.364.544.906.327.058.579.9011.819.121.0
302.41.267.63.8810.605.4115.17.5221.011.239.418.4
325.71.0416.83.2523.504.5532.56.3744.508.78115.7
3413.10.8536.82.7050.503.8168.55.35927.2316113.5
3629.00.68782.191053.101424.411886.0832211.4
3863.00.561581.752102.5157p3.603605.035989.5
401300.413071.373992.005152.886274.09/7.9
422530.315601.067091.569002.30/3.28/6.5

5.2 table 1-2 of the manual of environmental statistics

Water vapor and HCl gas separation pressure (mmHg) on the surface of the HCl aqueous solution
concentration
%
temperature (c)temperature (c)temperature (c)temperature (c)temperature (c)/
5060708090/
PHClPH2OPHClPH2OPHClPH2OPHClPH2OPHClPH2O//
100.0780.00.161300.352040.733101.48463//
140.2872.00.601161.251852.502734.8425//
181.1162.52.301024.551628.6024815.7374//
224.4252.08.6085.616.313829.321152317//
2617541.53.2569.058.5112100173169261//
2835.736.56460.711299.0188154309261//
307132.012453.522887.5340136542207//
3214127.723846.539076.5623120970284//
3427324.045040.572066.5/104/261//
3653.520.486034.8/57.0/90/140//
3895517.4/29.6/49.1/77.5/120//
40/14.5/25.0/42.1/67.3/105//
42/12.1/21.1/35.8/57.2/89.2//






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