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Hydrogen sulfide wet sulfuric acid preparation method with low emission

A process method, hydrogen sulfide technology, applied in chemical instruments and methods, sulfur compounds, chemical industry, etc., can solve the problems of unattainable concentration, and achieve the effect of improving the equilibrium conversion rate and the total conversion rate of SO2

Inactive Publication Date: 2014-05-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also has inherent defects: the wet contact acid production process adopts a one-time conversion and one-condensation process, and the SO 2 / SO 3 The equilibrium curve will limit the SO 2 The total conversion rate, the total conversion rate is 99%, and the tail gas emission of the device is SO 2 The concentration cannot reach less than 400mg / Nm 3 The new national standard for tail gas emission of sulfuric acid plant

Method used

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  • Hydrogen sulfide wet sulfuric acid preparation method with low emission
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0022] Taking the hydrogen sulfide acid gas removed from a certain coke oven gas as an example, the process method of the present invention is illustrated.

[0023] Hydrogen sulfide acid gas conditions:

[0024] Flow 3482Nm 3 / h

[0025] Pressure 0.03MPa

[0026] temperature 40°C

[0027] Gas composition (volume%)

[0028] h 2 S 13.92

[0029] CO 2 82.25

[0030] NH 3 0.11

[0031] HCN 0.19

[0032] h 2 O 3.45

[0033] CH 4 772PPM

[0034] N 2 balance

[0035] Combust hydrogen sulfide acid gas and excess hot air in an incinerator to generate process gas with composition:

[0036] Gas composition (volume%)

[0037] SO 2 3.41

[0038] SO 3 0.18

[0039] o 2 10.0

[0040] CO 2 21.3

[0041] h 2 O 6.61

[0042] N 2 58.49

[0043] The process gas is catalyzed and oxidized...

Embodiment 2

[0045] Taking the hydrogen sulfide acid gas eluted by a certain low-temperature methanol as an example, the process method of the present invention is illustrated.

[0046] Hydrogen sulfide acid gas conditions:

[0047]Flow 200Nm 3 / h

[0048] Pressure 0.03 MPa

[0049] temperature 40°C

[0050] Gas composition (volume%)

[0051] h 2 S 30.0

[0052] CO 2 62.84

[0053] C 3 h 8 1.0

[0054] C 4 h 10 1.85

[0055] CH 3 OH 0.15

[0056] N 2 0.75

[0057] Combust hydrogen sulfide acid gas and excess hot air in an incinerator to generate process gas with composition:

[0058] Gas composition (volume%)

[0059] SO 2 3.07

[0060] SO 3 0.16

[0061] o 2 12.07

[0062] CO 2 7.91

[0063] h 2 O 6.06

[0064] N 2 70.73

[0065] The process gas is catalyzed and oxidized thro...

Embodiment 3

[0067] Taking the hydrogen sulfide acid gas removed by a certain refinery as an example, the process method of the present invention is illustrated.

[0068] Hydrogen sulfide acid gas conditions:

[0069] Flow 2000Nm 3 / h

[0070] Pressure 0.06MPa

[0071] temperature 61 °C

[0072] Gas composition (volume%)

[0073] h 2 S 73.1

[0074] CO 2 21.7

[0075] C 3 h 8 0.4

[0076] NH 3 1.07

[0077] h 2 O 3.37

[0078] Combust hydrogen sulfide acid gas and excess hot air in an incinerator to generate process gas with composition:

[0079] Gas composition (volume%)

[0080] SO 2 4.35

[0081] SO 3 0.23

[0082] o 2 12.75

[0083] CO 2 1.44

[0084] h 2 O 6.65

[0085] N 2 74.59

[0086] The process gas is catalyzed and oxidized by the three-stage catalyst bed. After the first and second be...

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Abstract

The invention belongs to the technical field of inorganic chemical industry sulfuric acid preparation, and discloses a hydrogen sulfide wet sulfuric acid preparation method with high conversion rate and low emission. According to the hydrogen sulfide wet sulfuric acid preparation method, interlayer hot air mixed cold shock is adopted, and a steam superheater is also combined for process gas cooling; O2 concentration of the process gas is increased, equilibrium conversion rate of SO2 catalytic oxidation is increased, and SO2 total conversion rate is increased further; and at the same time, a NWS series high-efficient wet conversion specially-used vanadium catalyst is used, so that the SO2 total conversion rate reaches 99.2%, and exhaust gas emission of a wet conversion sulfuric acid preparation apparatus is reduced.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a high-conversion and low-emission hydrogen sulfide wet process for producing sulfuric acid. Background technique [0002] Hydrogen sulfide is the main resource of sulfur, it widely exists in natural gas and petroleum refining process, in coking, coal gasification, manufacture of barium carbonate and the production of some other chemical products, hydrogen sulfide is produced. The annual production of sulfur from hydrogen sulfide in the world accounts for about 90% of the total sulfur production. [0003] The use of hydrogen sulfide to produce sulfur usually adopts the Claus method. At the same time, in order to prevent environmental pollution, the Claus device also needs to be equipped with a huge tail gas treatment device. Therefore, the construction investment and production costs of the Claus method sulfur production device are very high, and many factories opera...

Claims

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Application Information

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IPC IPC(8): C01B17/74
CPCY02P20/10Y02P20/129
Inventor 田先国孙远龙董天雷
Owner CHINA PETROLEUM & CHEM CORP
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