摘要:
The present invention allows low-concentration hydrogen sulfide gas, which is generated at the time of regular inspection or start-up of a production plant, to be efficiently recovered and effectively supplied to a processing plant that uses hydrogen sulfide gas. In the invention, the hydrogen sulfide gas production plant is provided with a first supply pipe (14) that supplies hydrogen sulfide gas obtained from a sulfur recovery facility (13) to a processing plant X, and a second supply pipe (16) that is branched at a predetermined point (15) in the first supply pipe (14) and supplies the hydrogen sulfide gas from the sulfur recovery facility (13) to the processing plant X. The first supply pipe (14) has a concentration meter (22) that is provided on the upstream side than the branch point (15) and measures the concentration of the hydrogen sulfide gas. The first supply pipe (14) and the second supply pipe (16) have ON/OFF valves (23), (26), respectively, that are provided on the downstream side of the branch point (15) and perform ON/OFF control of the supply to the processing plant X through the supply pipe.
摘要:
All sulfur compounds can be efficiently removed from natural gas that contains hydrogen sulfide and other sulfur compounds such as mercaptan without using physical absorption. The process comprises an absorption step of treating natural gas by means of a chemical absorption method using an amine-containing solution to mainly remove hydrogen sulfide and carbon dioxide, an adsorption step of flowing the natural gas from the absorption step through a packed bed of a molecular sieve to mainly remove mercaptan, a recovery step of recovering sulfur compounds by converting the hydrogen sulfide removed in the absorption step into sulfur by means of the Claus process, a regeneration step of desorbing the mercaptan adsorbed on the molecular sieve in the adsorption step using heated gas and a reaction step of converting the mercaptan in the regeneration exhaust gas exhausted from the regeneration step into hydrogen sulfide. The reaction step is conducted by injecting steam or water at a ratio of H 2 O/S = 1 to 5 (molar ratio) relative to the sulfur in the regeneration exhaust gas in the presence of a catalyst under the conditions of a temperature level of 250 to 400°C and a pressure level of 1 to 10 MPa.
摘要翻译:所有硫化合物可以从不含物理吸收的含硫化氢和其他硫化合物如硫醇的天然气中有效地除去。 该方法包括通过使用含胺溶液主要除去硫化氢和二氧化碳的化学吸收法处理天然气的吸收步骤,使吸收步骤中的天然气从吸收步骤流过的填料床的吸附步骤 分子筛,主要去除硫醇,通过Claus方法将吸收步骤中除去的硫化氢转化为硫,回收硫化合物的回收步骤,使用吸附步骤中吸附在分子筛上的硫醇解吸的再生步骤,使用 将从再生步骤排出的再生废气中的硫醇转化为硫化氢的反应工序。 反应步骤通过在催化剂存在下,在温度水平的条件下以相对于再生废气中的硫的H 2 O / S = 1〜5(摩尔比)的比例,注入蒸汽或水 250〜400℃,压力水平为1〜10MPa。
摘要:
Process for eliminating COS and CS2 compounds contained in an industrial gas, wherein said gas containing an appropriate quantity of water vapour is contacted with a titanium oxide catalyst arranged in a high temperature reaction zone. The reaction is carried out while maintaining at specific values the ratio R between the number of water vapor moles and the number of moles of the compound(s) COS and CS2 in the supplied gas in contact with the catalyst, as well as the temperature at the outlet from the reaction zone. The process is applicable to the treatment of industrial gases usable in organic synthesis and containing COS and CS2 as impurities susceptible of perturbating synthesis reactions.
摘要:
Provided is a composite amine absorbent having an enhanced reaction rate. The composite amine absorbent absorbs at least one of CO2 and H2S in a gas, in which this liquid includes (a) a chain monoamine, (b) a diamine containing amino groups having the same number of substituents, (c) a chain diamine containing amino groups having different numbers of substituents, and (d) water.
摘要:
The present disclosure relates to a sulphur additive to suppress hydrogen sulphide emissions from Sulphur Extended Asphalt. The sulphur additive of the present disclosure comprises 5 sulphur in an amount ranging from 80 to 98 wt % and at least one aluminosilicate in an amount ranging from 2 to 20 wt %. The sulphur additive of the present disclosure suppresses the H2S emission up to acceptable safe limit during the preparation and application of the sulphur extended asphalt at elevated temperature.
摘要:
An object of the present invention is to reduce costs while maintaining safety in exhausting hydrogen sulfide gas. In exhaust facilities of a plant for manufacturing hydrogen sulfide gas, the concentrations of hydrogen sulfide gas leaking from a reaction facility, a cooling facility, and a sulfur removal facility, respectively, are measured by a measuring apparatus, and when a detected concentration is less than a predetermined concentration, a valve is controlled to exhaust hydrogen sulfide gas from a first exhaust pipe into the air, on the contrary, when a detected concentration is not less than a predetermined concentration, the valve is controlled to exhaust hydrogen sulfide gas from a second exhaust pipe to a gas treatment facility.
摘要:
The present invention allows low-concentration hydrogen sulfide gas, which is generated at the time of regular inspection or start-up of a production plant, to be efficiently recovered and effectively supplied to a processing plant that uses hydrogen sulfide gas. In the invention, the hydrogen sulfide gas production plant is provided with a first supply pipe (14) that supplies hydrogen sulfide gas obtained from a sulfur recovery facility (13) to a processing plant X, and a second supply pipe (16) that is branched at a predetermined point (15) in the first supply pipe (14) and supplies the hydrogen sulfide gas from the sulfur recovery facility (13) to the processing plant X. The first supply pipe (14) has a concentration meter (22) that is provided on the upstream side than the branch point (15) and measures the concentration of the hydrogen sulfide gas. The first supply pipe (14) and the second supply pipe (16) have ON/OFF valves (23), (26), respectively, that are provided on the downstream side of the branch point (15) and perform ON/OFF control of the supply to the processing plant X through the supply pipe.