阅读说明：本技术 脱硫化氢催化剂及制备方法和应用方法 (Hydrogen sulfide removal catalyst, preparation method and application method ) 是由 翟常忠 于 2020-05-27 设计创作，主要内容包括：本发明涉及脱硫化氢催化剂技术领域,是一种脱硫化氢催化剂及制备方法和应用方法,该脱硫化氢催化剂,组成包括调节pH的碱金属盐、无机钠盐或/和无机钾盐、有机钠盐或/和有机钾盐、有机传质促进剂。本发明所述液体脱硫化氢催化剂和固体脱硫化氢催化剂用于含硫化氢尾气治理和含硫化氢天然气净化,所述液体脱硫化氢催化剂有效脱除含硫化氢气体中的硫化氢,相比于现有络合铁液体脱硫剂,本发明的液体脱硫化氢催化剂循环量更小,则显著降低了液体脱硫化氢催化剂的消耗量,并且组成更加环保,符合当前气体处理的环保要求,由于本发明所述液体脱硫化氢催化剂的使用,使得脱硫装置更加小型化,更易于撬装化。(The invention relates to the technical field of hydrogen sulfide removal catalysts, in particular to a hydrogen sulfide removal catalyst, a preparation method and an application method thereof. The liquid hydrogen sulfide removal catalyst and the solid hydrogen sulfide removal catalyst are used for treating tail gas containing hydrogen sulfide and purifying natural gas containing hydrogen sulfide, the liquid hydrogen sulfide removal catalyst is used for effectively removing hydrogen sulfide in gas containing hydrogen sulfide, compared with the existing complex iron liquid desulfurizer, the liquid hydrogen sulfide removal catalyst has smaller circulation amount, the consumption of the liquid hydrogen sulfide removal catalyst is obviously reduced, the composition is more environment-friendly, and the environment-friendly requirement of current gas treatment is met.)

1. The liquid hydrogen sulfide eliminating catalyst consists of alkali metal salt for regulating pH value in 0-10 wt%, inorganic sodium salt or/and inorganic potassium salt in 0.5-25 wt%, organic sodium salt or/and organic potassium salt in 0.5-15 wt%, organic mass transfer promoter in 0.1-15 wt% and water for the rest.

2. The liquid hydrogen sulfide removal catalyst according to claim 1, wherein the organic mass transfer promoter is one or more of carboxylate and sulfonate fluorocarbon surfactants; or/and the alkali metal salt for adjusting the pH is more than one of sodium hydroxide and potassium hydroxide; or/and performing thin-wall labor at a speed of between 1.05g/cm and 1.25g/cm during thin-wall labor.

3. The liquid hydrogen sulfide removal catalyst according to claim 1 or 2, which is obtained by: mixing the alkali metal salt, inorganic sodium salt or/and inorganic potassium salt, organic sodium salt or/and organic potassium salt, organic mass transfer promoter and water.

4. A process for the preparation of a liquid dehydrosulphurization catalyst according to claim 1 or 2, characterized in that it is carried out as follows: mixing the alkali metal salt, inorganic sodium salt or/and inorganic potassium salt, organic sodium salt or/and organic potassium salt, organic mass transfer promoter and water.

5. A method for using the liquid hydrogen sulfide removal catalyst according to claim 1, 2 or 3, characterized by comprising: active carbon or active alumina is used as a filler of a desulfurizing tower, acid gas containing hydrogen sulfide is uniformly mixed into compressed air to form mixed gas, the content of the hydrogen sulfide in the mixed gas is more than 0 and less than 4 percent, the mixed gas enters from the bottom of the desulfurizing tower and is discharged from the top of the desulfurizing tower, a liquid hydrogen sulfide removal catalyst is sprayed into the desulfurizing tower from the top of the desulfurizing tower, the hydrogen sulfide in the mixed gas is catalytically oxidized into sulfur on the surface of the filler, and then the sulfur is flushed to the bottom of the desulfurizing tower by the liquid hydrogen sulfide removal catalyst.

6. A method for using the liquid hydrogen sulfide removal catalyst according to claim 1, 2 or 3, characterized by comprising: the gas containing hydrogen sulfide completes the hydrogen sulfide removal of the gas in a desulfurizing tower, the hydrogen sulfide is absorbed in a liquid hydrogen sulfide removal catalyst, then the liquid hydrogen sulfide removal catalyst absorbing the hydrogen sulfide is in a regeneration tower, air or oxygen is introduced to regenerate the liquid hydrogen sulfide catalyst, and simultaneously, sulfur elements in the liquid hydrogen sulfide removal catalyst are catalytically oxidized into sulfur.

7. A method for using the liquid hydrogen sulfide removal catalyst according to claim 1, 2 or 3, characterized by comprising: the hydrogen sulfide content of the acid gas obtained by MDEA desulfurization and pry analysis is about 25-35%, the acid gas obtained by MDEA desulfurization and pry analysis is sent into a microchannel reactor, the acid gas is absorbed by a liquid hydrogen sulfide catalyst, and then compressed air or oxygen is introduced to enable the hydrogen sulfide in the liquid hydrogen sulfide removal catalyst to be catalytically oxidized on a bubble wall membrane of the microchannel reactor to generate sulfur, and the sulfur is advected with the liquid hydrogen sulfide removal catalyst and discharged out of the microchannel reactor.

8. The method of using a liquid hydrogen sulfide removal catalyst according to claim 7, wherein the molar ratio of hydrogen sulfide to oxygen in the acid gas is 1:2 to 3.

9. A solid hydrogen sulfide removal catalyst prepared by using the liquid hydrogen sulfide removal catalyst of claim 1, 2 or 3, characterized by being obtained by: the liquid hydrogen sulfide removal catalyst and a conventional catalyst carrier are dipped by a conventional dipping method, and then the solid hydrogen sulfide removal catalyst is obtained by airing or drying.

10. A method for using the solid hydrogen sulfide removal catalyst according to claim 9, which is characterized by comprising the following steps: when the mixed gas containing hydrogen sulfide and oxygen or the mixed gas containing hydrogen sulfide and air passes through a desulfurizing tower filled with a solid hydrogen sulfide removing catalyst, the hydrogen sulfide gas is catalyzed and oxidized into sulfur by the solid hydrogen sulfide removing catalyst, and the gas desulfurization is completed.

Technical Field

The invention relates to the technical field of a hydrogen sulfide removal catalyst, and comprises a liquid hydrogen sulfide removal catalyst, a preparation method and an application method thereof, and also comprises a solid hydrogen sulfide removal catalyst and an application method thereof.

Background

Currently, in the fields of hydrogen sulfide tail gas treatment and hydrogen sulfide-containing natural gas purification, a plurality of hydrogen sulfide removal technologies are available, and the technologies can be divided into a dry method and a wet method, wherein the dry method comprises iron oxide and activated carbon, and also comprises molecular sieves and silica gel; the wet method mainly comprises the Claus process and the complexing iron. The technologies have the advantages and disadvantages, for the working condition of removing hydrogen sulfide from natural gas and tail gas with the daily latent sulfur amount of 50kg to 1000kg, the iron oxide type or activated carbon type dry hydrogen sulfide removing technology is generally adopted, the working sulfur capacity of the iron oxide type hydrogen sulfide removing technology is generally 8 percent to 12 percent (weight ratio), the regeneration is easy to spontaneously combust, the desulfurizer is frequently replaced, the equipment volume is large, and the waste desulfurizer has secondary pollution; the working sulfur capacity of the activated carbon desulfurizer is generally 30 to 45 percent (weight ratio), and the activated carbon desulfurizer has the advantages of high sulfur capacity, small equipment volume, less waste desulfurizer, no secondary pollution and the like, but the purified natural gas contains redundant 100 to 500ppm (volume ratio) of oxygen and has the fear of trace oxygen corrosion. While the Claus process is mostly adopted for large chemical plants, petrochemical plants, oil refineries and natural gas treatment stations, the complex iron technology is preferred to be adopted for medium and small desulfurization scales, for example, the daily latent sulfur content is between 500kg and 5000kg, the complex iron technology is preferred to be adopted, the MDEA wet desulfurization and complex iron sulfur conversion process technology is preferred to be adopted in the field of natural gas, and in order to prevent dissolved oxygen in the desulfurizer from entering the natural gas to cause oxygen corrosion of equipment, the hydrogen sulfide in the natural gas is not directly removed by using the complex iron desulfurizer. The existing complex iron desulphurization technology has the defects of large regeneration tower volume, high manufacturing cost, large complex iron solution circulation amount, energy conservation and the like, so that the desulphurization device cannot be skid-mounted.

Disclosure of Invention

The invention provides a hydrogen sulfide removal catalyst, a preparation method and an application method thereof, overcomes the defects of the prior art, and can effectively solve the problem of large hydrogen sulfide removal circulation volume in the existing hydrogen sulfide removal process.

One of the technical schemes of the invention is realized by the following measures: a liquid hydrogen sulfide removing catalyst comprises, by weight, 0% to 10% of an alkali metal salt for adjusting pH, 0.5% to 25% of an inorganic sodium salt or/and an inorganic potassium salt, 0.5% to 15% of an organic sodium salt or/and an organic potassium salt, 0.1% to 15% of an organic mass transfer promoter, and the balance of water.

The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:

the organic mass transfer accelerant is more than one of carboxylate and sulfonate fluorocarbon surfactants; or/and the alkali metal salt for adjusting the pH is more than one of sodium hydroxide and potassium hydroxide; or/and performing thin-wall labor at a speed of between 1.05g/cm and 1.25g/cm during thin-wall labor.

The liquid hydrogen sulfide removal catalyst is obtained by the following method: mixing the alkali metal salt, inorganic sodium salt or/and inorganic potassium salt, organic sodium salt or/and organic potassium salt, organic mass transfer promoter and water.

The second technical scheme of the invention is realized by the following measures: the preparation method of the liquid hydrogen sulfide removal catalyst in the technical scheme comprises the following steps: mixing the alkali metal salt, inorganic sodium salt or/and inorganic potassium salt, organic sodium salt or/and organic potassium salt, organic mass transfer promoter and water.

The third technical scheme of the invention is realized by the following measures: the application method of the liquid hydrogen sulfide removal catalyst comprises the following steps: active carbon or active alumina is used as a filler of a desulfurizing tower, acid gas containing hydrogen sulfide is uniformly mixed into compressed air to form mixed gas, the content of the hydrogen sulfide in the mixed gas is more than 0 and less than 4 percent, the mixed gas enters from the bottom of the desulfurizing tower and is discharged from the top of the desulfurizing tower, a liquid hydrogen sulfide removal catalyst is sprayed into the desulfurizing tower from the top of the desulfurizing tower, the hydrogen sulfide in the mixed gas is catalytically oxidized into sulfur on the surface of the filler, and then the sulfur is flushed to the bottom of the desulfurizing tower by the liquid hydrogen sulfide removal catalyst.

The fourth technical scheme of the invention is realized by the following measures: the application method of the liquid hydrogen sulfide removal catalyst comprises the following steps: the gas containing hydrogen sulfide completes the hydrogen sulfide removal of the gas in a desulfurizing tower, the hydrogen sulfide is absorbed in a liquid hydrogen sulfide removal catalyst, then the liquid hydrogen sulfide removal catalyst absorbing the hydrogen sulfide is in a regeneration tower, air or oxygen is introduced to regenerate the liquid hydrogen sulfide catalyst, and simultaneously, sulfur elements in the liquid hydrogen sulfide removal catalyst are catalytically oxidized into sulfur.

The fifth technical scheme of the invention is realized by the following measures: the application method of the liquid hydrogen sulfide removal catalyst comprises the following steps: the hydrogen sulfide content of the acid gas obtained by MDEA desulfurization and pry analysis is about 25-35%, the acid gas obtained by MDEA desulfurization and pry analysis is sent into a microchannel reactor, the acid gas is absorbed by a liquid hydrogen sulfide catalyst, and then compressed air or oxygen is introduced to enable the hydrogen sulfide in the liquid hydrogen sulfide removal catalyst to be catalytically oxidized on a bubble wall membrane of the microchannel reactor to generate sulfur, and the sulfur is advected with the liquid hydrogen sulfide removal catalyst and discharged out of the microchannel reactor.

The following is further optimization or/and improvement of the fifth technical scheme of the invention:

the molar ratio of hydrogen sulfide to oxygen in the acid gas is 1:2 to 3.

The sixth technical scheme of the invention is realized by the following measures: a solid hydrogen sulfide removal catalyst prepared by the liquid hydrogen sulfide removal catalyst in one technical scheme is characterized by being obtained by the following method: the liquid hydrogen sulfide removal catalyst and a conventional catalyst carrier are dipped by a conventional dipping method, and then the solid hydrogen sulfide removal catalyst is obtained by airing or drying.

The seventh technical scheme of the invention is realized by the following measures: the application method of the solid hydrogen sulfide removal catalyst is carried out as follows: when the mixed gas containing hydrogen sulfide and oxygen or the mixed gas containing hydrogen sulfide and air passes through a desulfurizing tower filled with a solid hydrogen sulfide removing catalyst, the hydrogen sulfide gas is catalyzed and oxidized into sulfur by the solid hydrogen sulfide removing catalyst, and the gas desulfurization is completed.

The liquid hydrogen sulfide removal catalyst and the solid hydrogen sulfide removal catalyst are used for treating tail gas containing hydrogen sulfide and purifying natural gas containing hydrogen sulfide, the liquid hydrogen sulfide removal catalyst is used for effectively removing hydrogen sulfide in gas containing hydrogen sulfide, compared with the existing complex iron liquid desulfurizer, the liquid hydrogen sulfide removal catalyst has smaller circulation amount, the consumption of the liquid hydrogen sulfide removal catalyst is obviously reduced, the composition is more environment-friendly, and the environment-friendly requirement of current gas treatment is met.

Drawings

FIG. 1 is one of the processes for removing hydrogen sulfide.

FIG. 2 is a second process flow of existing hydrogen sulfide removal.

Detailed Description

The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention. The various chemical reagents and chemical articles mentioned in the invention are all the chemical reagents and chemical articles which are well known and commonly used in the prior art, unless otherwise specified; the percentages in the invention are mass percentages unless otherwise specified; the desulfurization apparatuses mentioned in the present invention are those commonly used in the art, unless otherwise specified.

The invention is further described below with reference to the following examples: