Changchun desulfurization catalyst manufacturer Dongshi brand DSH special desulfurization catalyst with high sulfur capacity

  At present, cobalt phthalocyanine catalyst is mainly used in wet desulfurization process
It has many advantages, such as small dosage, low operation cost, tower cleaning and resistance reduction
However, its side reaction is difficult to control, and the content of by-salt in the reaction process increases rapidly
When the content of by-salt accumulates to a certain extent, the desulfurization effect will be affected, Therefore, regular replacement of desulfurization liquid is required to maintain the stable operation of the process
Many manufacturers are therefore equipped with desulfurization waste liquid salt extraction devices
However, with the change of the market, the extracted by-product salt is also unsalable, which brings new environmental protection problems to many manufacturers
Therefore, we consider to restrain the generation of secondary salt from the source, fundamentally solve the phenomenon of replacing desulfurization liquid due to high secondary salt in desulfurization process, and solve the environmental protection problem of manufacturers
Dongshi brand DSH high sulfur capacity salt suppression catalyst is independently developed by Changchun Dongshi Technology (Group) Co
, Ltd
It has the dual effects of high sulfur capacity and salt suppression, which can not only ensure stable desulfurization efficiency, but also effectively inhibit the generation of side reactions, and better meet the current market and environmental protection requirements

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Principle of catalytic reaction
1)
after H2S in the reaction gas is absorbed and dissolved in the desulfurization solution, it first reacts with the alkali (or ammonia) in the desulfurization solution: H2S + Na2CO3 & rarr; NAHS+NAHCO3H2S+NH3●H2O→ NH4HS+H2O
2) Under the action of catalyst, the generated sulfur hydrogen radical is oxidized to elemental sulfur in the presence of catalyst

  DSH2HS-+1/2O2→ 2S↓+ H2O
3)
regeneration reaction in order to restore the ability of the solution to absorb hydrogen sulfide, the solution must be regenerated
The regeneration process mainly regenerates the catalyst into oxidation state;
DSH (reduced state) + O2 & rarr; DSH (oxidized state)
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Characteristics of DSH high sulfur capacity salt suppression desulfurization catalyst
1) High sulfur capacity, low circulating capacity, saving investment and operation cost
For the traditional desulfurization unit, when the hydrogen sulfide content in the feed gas fluctuates greatly, the hydrogen sulfide content of the outlet purified gas will fluctuate greatly or even exceed the standard
With high sulfur capacity, the desulfurization device can automatically deal with the above fluctuations without changing the operation manually and will not affect the desulfurization rate
After the application of DSH desulfurization catalyst, the sulfur capacity of desulfurization liquid is significantly improved and the desulfurization efficiency is greatly improved
Under the same working conditions, the solution circulation can be reduced by more than 20%, so as to reduce power consumption and save operation cost
The sulfur evolution speed is faster
Under the same working conditions, the filling amount of desulfurization tower can be reduced by 10-20%, which can effectively reduce the system resistance
2) Salt suppression, reducing the quantity of waste liquid discharged, reducing the pressure of environmental protection, strong selectivity of desulfurization catalyst, effectively controlling the occurrence of side reactions in the process of sulfur separation, and avoiding the generation of by-salt due to comprehensive reasons such as excessive oxidation after use, so a lot of investment in salt extraction equipment and operation cost of salt extraction and treatment cost of a lot of by-salt products are saved; And with the emergence of the system foam will decline, optimize the desulfurization liquid components
3) do not block the tower, improve the flotation condition of sulfur foam, increase sulfur production, use catalyst, improve the flotation status of sulfur foam, control the effective discharge of sulfur foam, and increase sulfur production significantly
At the same time, it can appropriately reduce the regeneration residence time and reduce the equipment investment of the regeneration tank
It is especially suitable for enterprises with small volume and short regeneration time, but can not increase the regeneration residence time
4) No corrosion, effectively control the sulfate content and reduce the alkali consumption
The catalyst itself does not corrode, and can effectively control the sulfate, and will not excessively oxidize the elemental sulfur or thiosulfate into sulfate, so as to avoid serious corrosion to the system equipment due to the high sulfate content, inhibit the secondary salt and reduce the alkali consumption, eliminating part of the alkali consumption of the secondary salt
5) Wide operating range, strong oil resistance, dust resistance and good temperature resistance
After the application of catalyst, the operating range of desulfurization system becomes wider
The change of alkalinity and temperature in a certain range will not affect the formation of by-salt and desulfurization efficiency; At the same time, a small amount of ash and oil in the system will not cause poisoning failure of the catalyst, will not affect the export index of hydrogen sulfide, and the generation operation is more stable
6) No concentration is required for initial dosing, low concentration and low consumption
No concentration is required for initial replacement of the catalyst, which saves the manufacturer millions of investment costs for initial massive dosing, and the system replacement process is more stable and economical; At the same time, compared with other complex iron catalysts, the catalyst has less dosage, lower control concentration and more stable application effect

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Application method of DSH high sulfur capacity salt suppression desulfurization catalyst 1) preparation of desulfurization solution