Changchun desulfurization catalyst manufacturer Dongshi brand 888-jds special desulfurization catalyst for coke oven gas

  In recent years, the coking industry has developed rapidly in China, so the application of by-product coke oven gas in the chemical industry has been paid more and more attention, which also promotes the diversified development process of follow-up products with coke oven gas as raw material
For example, coke oven gas is used as raw material to produce methanol, used as city gas, used for combustion and power generation, etc
However, due to the particularity of coke oven gas composition, there are many and complex harmful substances
Therefore, in order to make better use of coke oven gas, these harmful substances must be removed as much as possible
The removal of H2S is an important link
At present, there are many domestic processes for removing H2S from coke oven gas by wet oxidation, such as pre desulfurization, post desulfurization, desulfurization in front of the fan, desulfurization after the fan, etc
The fundamental idea of the application of all these processes is how to make full use of alkali source, but the selection and application of catalysts have not been paid enough attention
We know that coke oven gas contains harmful substances such as benzene, naphthalene, tar and HCN, which cannot be completely removed before desulfurization
Once these harmful substances enter the system, they will have a serious impact on desulfurization
In particular, it has a great impact on desulfurization catalysts, which makes it difficult for many catalysts to adapt to desulfurization under this working condition
Even if they are reluctantly applied, it will also cause problems such as low desulfurization efficiency of the system, high by-salt, large external displacement of solution, serious environmental pollution and so on
In this case, the gas purification design and research center of our company carried out thousands of scientific experiments by simulating the composition of coke oven gas and the actual desulfurization liquid composition, and finally developed a new generation of product: 888-jds special desulfurization catalyst for coke oven gas, which attracted great attention in the industry after it was put on the market
Its biggest characteristics are: strong anti-interference ability, higher activity, stronger oxidation ability, less dosage, high efficiency and low formation rate of by-salt
It is fully suitable for coke oven gas desulfurization under various process conditions

1
Characteristics of 888-jds catalyst
◆ 888-jds desulfurization catalyst can be well dissolved in water or alkaline solution
◆ under different alkali sources and conditions, the potential value of the solution is 0
2 ~ 0
3V
◆ in application, it is appropriate to use 20 ~ 35mg / L
with the increase of catalyst concentration in the solution, the sulfur evolution selectivity increases continuously
◆ good chemical stability, no decomposition in acidic or alkaline medium
◆ it has good thermal stability, does not decompose below 200 ℃, and can remain stable under the operating conditions of sulfur melting kettle
◆ the catalyst itself is non-toxic and non corrosive, which is conducive to environmental protection
◆ the catalyst has stable activity, long service life and no catalyst poisoning caused by cyanide
◆ it can remove both inorganic and organic sulfur efficiently

2
Functions and characteristics of 888-jds desulfurization catalyst ◆ adding the desulfurization solution composed of this catalyst to the alkaline aqueous solution can be used to remove H2S, organic sulfide and HCN dominated by COS from coke oven gas
◆ it can adapt to a wide range of H2S content of the treated gas, and can achieve satisfactory results from 1g / Nm3 to tens of g / Nm3
◆ the gas purification degree is high, and the crude desulfurization unit can reduce the H2S in the purified gas to less than 20mg / Nm3
◆ it has good selectivity for absorbing H2S
When the CO2 / H2S in the treated gas is high, it can also remove H2S well
Even under the condition of 90% CO2 content, H2S can be removed to ppm level
◆ the desulfurization process has low side reaction generation rate, high sulfur recovery rate and high purity of recovered sulfur
◆ the sulfur particles precipitated in the desulfurization process are large and easy to separate and recover
◆ due to the reaction of elemental sulfur to form polysulfide, the reaction process itself can inhibit and eliminate sulfur tower blockage
◆ this product has strong activity, low dosage, economic operation and convenient use
The original desulfurization liquid can not be discharged for the transformation of the old system

3
Main process conditions
3
1 when 888-jds is used as catalyst for coke oven gas desulfurization, if ammonia is used as alkali source, in order to improve the alkalinity of desulfurization liquid, the gas temperature shall be reduced as much as possible
A precooling tower shall be set in front of the desulfurization tower to make the gas entering the desulfurization tower temperature ≤ 30℃。 It shall also have the means to supplement ammonia to the desulfurization system, and the ammonia concentration in the desulfurization solution shall be maintained at ammonia / sulfur ≥ 1
2。 3
2 absorption temperature: 27 ~ 30 ℃, regeneration temperature: 30 ~ 35 ℃
3
3 liquid gas ratio: related to H2S content in gas
General & Ge; 12L/m3。 3
4 the blowing intensity of regeneration oxidation tank is 60 ~ 110m3 / m2h
3
5 the regeneration blowing intensity of regeneration tower is 110 ~ 130m3 / m2h, which is related to the total amount of H2S removed
The concentration of 888-jds in desulfurization solution is generally 20 ~ 30mg / L
Desulfurization liquid suspended sulfur ≤ 1
3g/L。 3
6 three salts of desulfurization solution [NH4CNS + (NH4) 2s2o3 + (NH4) 2SO4 content shall be ≤ 250g/L。 3
7 tar mist content ≤ 30mg / Nm3, naphthalene content ≤ 200mg/Nm3。 3
8 when Na2CO3 is used as alkali source, the total alkalinity of desulfurization solution is 20 ~ 35g / L, the pH value is 8 ~ 9, and the absorption temperature is 35 ~ 42 ℃
Other parameters are not significantly different from those of ammonia as alkali source
For more experience and technology of desulfurization, please pay attention to WeChat official account: east lion desulfurization technology cooperation network Changchun east lion Technology (Group) Co
, Ltd
provides mobile phone 888 desulfurization catalyst, sulfur removal catalyst, sulfur dioxide, biogas, coke oven gas desulfurization catalyst, blast furnace gas desulfurization technology, various desulfurization equipment and other contact telephone: 0431-84505111 Mobile: 15725121076