Multi-metal in-situ doped desulfurizing agent based on low-coalification-degree inferior coal and preparation method thereof

Abstract

The invention discloses a multi-metal in-situ doped desulfurizing agent based on low-coalification-degree inferior coal and a preparation method thereof. The preparation method comprises the following steps of: (1) screening out a type of low-coalification-degree coal containing multiple metal elements according to industrial analysis and element analysis of coal; (2) drying, crushing and screening the screened low-coalification-degree coal to obtain pulverized coal; and (3) carrying out heat treatment on the pulverized coal to obtain the multi-metal in-situ doped desulfurizing agent. According to the method, the defect that raw materials are expensive when the hydrogen sulfide adsorbent is prepared is overcome, meanwhile, the characteristic that the low-coalification-degree inferior coal is rich in iron, calcium, magnesium and other metal components is utilized, the low-coalification-degree inferior coal serves as an active component to prepare the desulfurizing agent, no agent needs to be added, the waste of resources is avoided, meanwhile, the solid waste, namely the inferior coal, is effectively utilized, and the purpose of preparing an efficient and cheap hydrogen sulfide adsorbent is achieved.

Description

technical field [0001] The invention relates to a polymetallic in-situ doped desulfurizer based on low-coalification inferior coal and a preparation method thereof, belonging to the technical fields of solid waste comprehensive utilization and air pollution control. Background technique [0002] Hydrogen sulfide (H 2 S) The gas mainly comes from natural gas, coal gas, waste treatment station, sewage treatment plant, biogas production, paper mill, petroleum refinery and other production or treatment processes. Invasion into the human body, causing poisoning, eye stinging tears, vomiting, and even coma. Therefore H 2 The removal of S gas is of great significance. [0003] The existing hydrogen sulfide gas removal methods mainly include wet method and dry method. The wet method generally uses an absorption liquid to remove hydrogen sulfide, which can convert hydrogen sulfide into elemental sulfur at one time. The equipment has a large processing capacity and can be continuou...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a multi-metal in-situ doped desulfurizer based on low-coalification low-quality coal and its preparation method, which solves the disadvantage of expensive raw materials when preparing hydrogen sulfide adsorbents. Low-coalification low-quality coal is rich in various metal components such as iron, calcium, and magnesium. It is used as an active component for the preparation of desulfurizers without adding any chemicals, which avoids waste of resources and effectively utilizes low-quality coal. Coal, a solid waste, has achieved the purpose of preparing efficient and cheap hydrogen sulfide adsorbent

Images