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| Address: North Suburb of Anqiu, Weifang, Shandong Province, China. |
| Tel:+86-536-4398789 |
| Fax:+86-536-4398789 |
| Post Code:262100 |
| Website:www.aobaocatalyst.com |
| Email:aqzwmzwm@hotmail.com |
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Based on more than 30 year’s experience with sulfuric acid catalyst, our company can manufacture several types of catalysts in different shapes and sizes, such as S101、 S101-2H 、 S101-3MH 、 S101-3BZ 、 S108 、 S108-2H 、 S108-3MH 、 S108-3BZ 、 S107 、 S107-2H 、 S107-3MH ， S109 、 S106 、 AC S-201, some of which won the honorary title in Shandong province and Ministry of Chemical Industry, etc
Our manufacturing technique is advanced. The carrier is treated by repulped stock processing, washed by hot concentrated acid, pretreatment of calcinations, and added several rare accessory ingredients, then molded by using advanced patent technology. The performance of our catalysts is excellent, with high activity, low ignition temperature, high mechanical strength, low losses of screening, and long life. As for star ring type of catalyst, it has advantage of large surface area, low Pressure drop, and good resistance of dust accumulation.
Our company was authorized the Certificate of Quality Management System (ISO9001:2000) in 2002, and acquired the qualification of equipment manufacture, construction and installation of specialty product supply in phosphate fertilizer and sulphuric acid industry. Meanwhile, our catalysts are listed in “Recommend Products after China’s Entry into WTO” by China Council for the Promotion of International Quality, the production scale and the quality of our catalysts become a leading position in China as catalyst manufacturer.
Based on experience through more than 30 years, we have served for more than 500 sulphuric acid plants, and well appreciated by our sulphuric acid catalyst users.
Continuous innovation is Aobao’s eternal subject, and pursuit of mutual benefit is our eternal conception. We strive to expand by continually improving our products and service to cooperate with various sulphuric acid plants, be strong and prosperous together.
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1. Range of Application
Vanadium pentoxide series sulfuric acid catalysts suits for that sulphuric acid plants use the contact process to promote the oxidation of SO2 and O2 to give SO3. In metallurgical acid plants, it should be 1.6-1.8m3 / (km3 gas /h). It can guarantee the air speed of operation to add 10-20% more when using type star ring catalysts or ring catalysts
2. Operating Requirements
1). Type S101, S109 series of broad temperature catalysts suit for every bed of converter.
2). Type S107, S108 series of low temperature catalysts suit for 1/3 top of the first bed to decrease inlet operating temperature, and 4th bed, 5th bed to improve equilibrium conversion and decrease gas emission.
3). Anti-Arsenic Type Catalysts S106 suit for the content of Arsenic 5-50mg/m3 in gas.
4). Install the catalyst beginning at the far side of the converter working back towards the manway. Use the marks on the converter wall as a guide for leveling the catalyst.? Avoid walking directly on the catalyst. Use plywood sheets or boards laid on top of the catalyst if access is required across the top of the bed.
5). New catalyst is easy to get damp, so it is better to choose fine days to sift it and load it .Time that catalyst is exposed in air should be as short as possible.
6). Catalysts used in low temperature beds can be moved to high temperature beds, but contrarily it can’t be loaded. New catalysts should be loaded in the surface of each bed, and separated from used catalysts with stainless steel nets.
7). It should inspect the pressure drop of each bed before repairing, and inspect the activity of catalysts in each bed before loading, so that supply some information for screening, loading or removing.
3. Star-up and Shut down
1). Heating up: Before start-up, heating up with dry air. The rate of heating is 20-30℃/h, but for new catalysts, the rate of heating should be controlled in 10-15℃/h before it reaches 150℃. In the plants using diesel oil for heating, the discontinuous heating method is recommended when the temperature is under 150℃, and make sure it burnt thoroughly in order to prevent the surface of catalysts extracting carbon. While heating, please control the moisture from blower, which should be not higher than 0.1g/Nm3.
2). Gas injected: When inlet temperature of 1st bed reaches above 400℃, and inlet temperature of end bed is above 250℃, then the gas can be injected. Initial volume of gas flow is 1/3-1/2 of the total, and the gas concentration below 5% is ok. Then, make sure the exit temperature of 1st bed is not higher than 650℃, and increase the gas concentration and gas flow properly.
3).Shut down: For a short-time shut down, it should increase the inlet temperature of 1st bed(increasing 15℃), and close valve. However, for a heavy repair or long-time shut down, it should use dry air above 400℃ to replace the gas in the converter, till the content of SO3 in emission gas is less than 0.03%.
4. Purifying index demanded of catalysts:
Moisture ≤ 0.lg/Nm3 Acid ≤ 0.03lg/Nm3
As ≤ 0.00lg/Nm3(Type S106 catalysts: 5-50mg/ Nm3)
Dust ≤1.0g /Nm3 F≤2.0g /Nm3
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