High-efficiency sulfur recovery method of waste gas containing hydrogen sulfide
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A hydrogen sulfide and sulfur recovery technology, applied in the direction of sulfur preparation/purification, energy input, etc., can solve the problems of not considering the properties, unable to ensure that the acid mist in the condensation stage meets the standard, and unable to apply to industrial production, etc.
Active Publication Date: 2013-09-25
SINOPEC NANJING ENG & CONSTR +1
View PDF3 Cites 12 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0004] CN200680056894.X introduces a sulfuric acid manufacturing method, but what it introduces is basic common sense, which is a well-known necessary step in the sulfuric acid industry, and does not take into account the presence of SO 3 , SO 2 , sulfuric acid, water vapor and other materials cannot be used in industrial production
The method described in the specific example of this patent is theoretically feasib
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0035] Embodiment 1: Taking the waste gas from the purification section of a coal chemical plant as an example to illustrate the method for efficient sulfur recovery from hydrogen sulfide waste gas according to the present invention.
[0036] Exhaust gas conditions: temperature 33°C, pressure 2.2bar, gas composition as follows:
[0037]
[0038]
[0039] The above-mentioned waste gas from the purification section enters the incinerator 1 together with the hot air from the first-stage heater 5 with a shell side outlet temperature of ~180°C for combustion, and the sulfur components such as hydrogen sulfide in the gas are completely burned to produce water and SO 2 , CO, NH in gas 3 , HCN and other components burn to produce CO 2 , N 2 and water, and the temperature of the incinerator 1 is controlled at about 1100-1250° C. by adjusting the amount of air. The high-temperature process gas exiting the combustion furnace 1 recovers heat through the waste heat boiler 2 to pro...
Embodiment 2
[0040] Embodiment 2: Taking the sulfur-containing waste gas of an oil refinery as an example to illustrate the high-efficiency method for hydrogen sulfide waste gas of the present invention. There are three streams of waste gas in the plant, namely acid water stripping acid gas, a set of 1.8 million tons / year ARGG device acid gas, and a set of 1 million tons / year ARGG device acid gas. The composition of the three acid gases is as follows:
[0041] 1. Sour water stripping acid gas
[0042] Temperature: 70°C, Pressure: 70kPag
[0043]
[0044] 2. 1.8 million tons / year acid gas of ARGG unit
[0045] Temperature: 74°C, Pressure: 70kPag
[0046]
[0047] 3. 1 million tons / year ARGG plant acid gas
[0048] Temperature: 74°C, Pressure: 70kPag
[0049]
[0050] The plant decided to convert the above-mentioned sulfur-containing waste gas into sulfuric acid to meet the sulfuric acid required by other devices in the plant, and at the same time generate steam for production. ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention discloses a high-efficiency sulfur recovery method of hydrogen sulfide containing waste gas. The high-efficiency sulfur recovery method is characterized in that the H2S containing waste gas is completely burned in an incinerator to generate SO2 gas and water vapor, then the SO2 gas and the water vapor are cooled through a waste heat boiler to generate process gas with the temperature of 300 DEG C-500 DEG C, and simultaneously, the 7.0-7.5 MPa high-pressure gas is generated; the process gas enters an oxidation reactor with a reaction section and a cooling section and is catalyzed and oxidized in the oxidation reactor to generate SO3 which is converted into sulfuric acid vapor; the sulfuric acid vapor enters a cooler and is cooled by air when the temperature of the sulfuric acid vapor is above 250 DEG C, so that sulfuric acid liquid and non-condensable gas are generated; the non-condensable gas is subjected to multistage heating, and then is subjected to secondary catalytic oxidation and secondary cooling separation, the non-condensable gas reaching the emission standards is discharged, and the sulfuric acid liquid separated out is collected. The high-efficiency sulfur recovery method has the advantages that the corrosion on production equipment can be avoided, the technology practicability is ensured, the heat is stepwise used according to the difference of liquid levels, and the utilization rate of heat is high.
Description
technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a method and a device for efficiently recovering waste gas containing hydrogen sulfide. Background technique [0002] In chemical fertilizer, petrochemical, natural gas, coal chemical, coking and chemical fiber industries, sulfur in raw materials is basically H 2 The form of S comes out of the system. h 2 S is a poisonous and harmful gas, which is not easy to store and cannot be discharged directly, and must be recycled. Currently recovering H 2 There are many methods for S, among which the best effect is to recover sulfur and sulfuric acid, but the recovery efficiency of these two methods is not high enough, and the exhaust gas cannot meet the new national environmental protection standard of 400mg / Nm 3 requirements. [0003] Utilize H 2 There are two methods for producing sulfuric acid from waste gas: dry method and wet method. The dry acid production ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more