公开(公告)号：US20220341590A1

公开(公告)日：2022-10-27

申请号：US17398531

申请日：2021-08-10

Applicant: Kunming University of Science and Technology

Inventor： Qiulin Zhang ,  Ping Ning ,  Lianyun Gao ,  Jianjun Chen ,  Tianrun Shao

IPC: F23G7/07 ,  F28D7/00 ,  F23K1/00 ,  F23C13/04

Abstract: The present disclosure provides a graded oxygen regulating, explosion preventing and recycling system and method for liquid nitrogen wash tail gas, and relates to the technical field of environmental protection and energy utilization. The system provided by the present disclosure includes a multi section catalytic combustor, the multi-section catalytic combustor being divided into a first-section catalytic combustion region, a second-section catalytic combustion region, and a third-section catalytic combustion region, the first-section catalytic combustion region and the second-section catalytic combustion region being internally filled with multiple layers of catalysts that are disposed at intervals, and an air flow guide pipe being arranged above each layer of catalyst; a first-section heat exchanger communicating with the first-section catalytic combustion region; a second-section heat exchanger communicating with the second-section catalytic combustion region; a pulverized coal drying section communicating with the second-section heat exchanger; and a boiler section communicating with the third-section catalytic combustion region.

公开(公告)号：US11440842B2

公开(公告)日：2022-09-13

申请号：US16897447

申请日：2020-06-10

Applicant: KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Ping Ning ,  Jiacheng Bao ,  Xin Sun ,  Yansu Luo ,  Kai Li ,  Chi Wang

IPC: C04B18/14 ,  C04B41/53 ,  C04B7/17 ,  B01D53/80 ,  C04B7/36 ,  C22B7/04 ,  B01D53/60 ,  C04B5/06 ,  C04B7/147

Abstract: The invention belongs to the technical field of the resource treatment of industrial wastes, and particularly relates to a method for preparing a cementing material using smelting industrial waste slag after utilizing the simultaneous removal of SO2 and NOx in flue gas and an application of the cementing material obtained by the same. According to the invention, SO2 and NOx in the flue gas can be treated with the smelting industrial waste slag, meeting requirement of flue gas desulfurization and denitration; moreover, the smelting industrial waste slag can be purified and separated by means of waste gas resources to obtain a cementing material, realizing the resource utilization of the smelting industrial waste slag and waste gas.

公开(公告)号：US11426719B2

公开(公告)日：2022-08-30

申请号：US16736616

申请日：2020-01-07

Applicant: Kunming University of Science and Technology

Inventor： Kai Li ,  Yingwu Wang ,  Ping Ning ,  Qiang Lin ,  Xin Sun ,  Chi Wang ,  Xin Song ,  Xiao Chen

IPC: C08K3/04 ,  B01J37/04 ,  B01J6/00 ,  B01J21/18 ,  B01J37/08 ,  B01D53/86 ,  B01J35/10

Abstract: The present invention discloses a preparation method of a catalyst with white carbon black modified by Zr—Nd—O and use thereof, and belongs to the field of catalyst technologies. In the present invention, an organic solvent evaporation induced self-assembly method is used to load Zr—Nd—O onto white carbon black to obtain a mesoporous Zr—Nd—O/white carbon black catalyst. The mesoporous Zr—Nd—O/white carbon black catalyst in the present invention has high catalytic activity, contains uniformly distributed mesopores with a relatively large average aperture, and has a simple preparation process, etc.

公开(公告)号：US11247197B1

公开(公告)日：2022-02-15

申请号：US17137028

申请日：2020-12-29

Applicant: Kunming University of Science and Technology

Inventor： Kai Li ,  Yaxi Zhang ,  Ping Ning ,  Chi Wang ,  Fei Wang ,  Xin Sun ,  Yixing Ma ,  Xin Song ,  Qian Li

IPC: B01D53/86 ,  B01J21/08 ,  B01J29/46 ,  B01J35/02 ,  B01J37/02 ,  B01J37/08

Abstract: The present disclosure relates to the technical field of industrial waste gas purification, in particular to a core-shell structured catalyst, a preparation method and use thereof. The present disclosure provides a core-shell structured catalyst including a metal oxide-molecular sieve as a core and porous silica (SiO2) as a shell, where the metal oxide-molecular sieve includes a molecular sieve and a metal oxide loaded on the molecular sieve, the metal oxide includes an oxide of a first metal and an oxide of a second metal, the first metal is Fe, Cu, Ti, Ni or Mn, and the second metal is Ce or La. The core-shell structured catalyst of the present disclosure can enable effective removal of HCN and AsH3 at the same time with a stable effect, and no secondary pollution.

公开(公告)号：US20200023309A1

公开(公告)日：2020-01-23

申请号：US16515634

申请日：2019-07-18

Applicant: Kunming University of Science and Technology

Inventor： Senlin Tian ,  Yuxin Song ,  Jianhong Huang ,  Xuewei Hu ,  Yingjie Li ,  Ping Ning

IPC: B01D53/60 ,  B01D53/79 ,  B01D9/00

Abstract: The invention is a device and method for purifying sulfur dioxide and nitrogen oxide in flue gas with an electrolysis-chemical advanced oxidation enhanced ammonia method. The device includes a thermal activation reactor, ammonium hydroxide storage tank, absorption tower, electrolytic bath and crystallization separator. The method takes raw material part of an ammonium sulfate solution that is a reaction product of ammonia and sulfur oxide in flue gas, and an ammonium persulfate solution prepared by electrolysis of an electrolytic bath as an oxidant to enhance the efficiency of purifying sulfur dioxide and nitrogen oxide in the flue gas with an ammonia method. A thermal activation reactor activates an ammonium persulfate containing solution to generate a strong oxidizing SO4⋅−, so that NOx and SO2 in the flue gas may be more efficiently converted into a product having higher solubleness for enhanced removal of sulfur dioxide and nitrogen oxide in the flue gas.

公开(公告)号：US20230303402A1

公开(公告)日：2023-09-28

申请号：US18124792

申请日：2023-03-22

Applicant: Kunming University of Science and Technology

Inventor： Fei Wang ,  Kai Li ,  Ping Ning ,  Zhao Li ,  Xin Sun ,  Yixing Ma ,  Chi Wang

IPC: C01F7/34

CPC classification number: C01F7/34 ,  C01P2006/82 ,  C01P2004/64

Abstract: The present disclosure provides a preparation method of nano-aluminum oxide (nano-Al2O3) with a controllable hydroxyl content, belonging to the technical field of nano-alumina. H2O2 dissolved in water dissociates a large number of hydroxyl radicals. In the present disclosure, a resulting H2O2 solution is used as a solvent for precipitation; during the precipitation, a soluble aluminum salt and a pore-enlarging agent are reacted to generate a precipitate under alkaline conditions, and the hydroxyl radicals are distributed on a surface of the precipitate. During drying, the hydroxyl radicals are converted into bound water and distributed on a surface and in pores of an aluminum hydroxide precursor; during roasting, the bound water is destroyed to form hydroxyl. The hydroxyl content of the nano-Al2O3 can be regulated by controlling a concentration of the H2O2 solution, and the nano-Al2O3 has the hydroxyl content positively correlated with the concentration of the H2O2 solution.

公开(公告)号：US11731873B2

公开(公告)日：2023-08-22

申请号：US16821623

申请日：2020-03-17

Applicant: KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Ping Ning ,  Xin Song ,  Xin Sun ,  Yixing Ma ,  Kai Li ,  Senlin Tian

IPC: B01D53/14 ,  C01B17/02 ,  B01D53/18

CPC classification number: C01B17/021 ,  B01D53/1425 ,  B01D53/1493 ,  B01D53/185 ,  B01D2252/10

Abstract: A gas-solid separating method and a gas-solid separating system for simple substance sulphur in sulphur-containing exhaust are provided. The gas-solid separating method for simple substance sulphur in sulphur-containing exhaust comprises the following steps: first, cooling sulphur-containing exhaust at an extremely high speed; then, separating dust; finally, recycling a heavy liquid phase solvent and simple substance sulphur. The system comprises a quick cooling system, a low-temperature washing and purifying system, a light liquid phase and heavy liquid phase separating system, a washing liquid recycling system and a simple substance sulphur recycling system.

公开(公告)号：US11478672B2

公开(公告)日：2022-10-25

申请号：US16809685

申请日：2020-03-05

Applicant: Kunming University of Science and Technology

Inventor： Ping Ning ,  Bin Li ,  Liwei He ,  Zhang Lin ,  Xueming Liu

IPC: A62D3/36 ,  C22B7/04 ,  A62D3/37 ,  C22B34/32 ,  A62D101/40

Abstract: The present invention discloses a method for detoxifying chromium slag by using high sulfur coal. The method includes: sieving chromium slag into coarse-grained chromium slag and fine-grained chromium slag, air-drying and crushing both the coarse-grained chromium slag and the fine-grained chromium slag; separately mixing the crushed coarse-grained chromium slag and fine-grained chromium slag with the crushed high sulfur coal uniformly; adjusting pH values of a coarse-grained slag mixture and a fine-grained slag mixture to 8.0-11.0 and moisture content thereof to 12%-18%; conducting reduction on the treated coarse-grained slag mixture and fine-grained slag mixture, where the reduction temperature of the fine-grained slag mixture is 500-700° C., the reduction time of the fine-grained slag mixture is 10-30 min, the reduction temperature of the coarse-grained slag mixture is 800-1000° C., the reduction time of the coarse-grained slag mixture is 10-30 min; after the reduction, conducting water quenching, and discharging the product.

公开(公告)号：US11332380B2

公开(公告)日：2022-05-17

申请号：US16820982

申请日：2020-03-17

Applicant: Kunming University of Science and Technology

Inventor： Ping Ning ,  Senlin Tian ,  Jianhong Huang ,  Yunjian Chen ,  Xuewei Hu ,  Yingjie Li

IPC: B01D53/50 ,  B01D53/80 ,  C01F7/06 ,  C01G49/06 ,  C22B3/06 ,  C22B3/22 ,  C22B21/00 ,  C01F7/066 ,  C01F7/0646

Abstract: The present invention discloses a method for aluminum-enhanced dealkalization of red mud and separation and recovery of aluminum and iron. The method includes: dissolving red mud in water, introducing excessive SO2, introducing O2 for aeration, and refluxing part of alkaline leachate after filtering; when pH of a red mud mixture decreases to below 3, washing and filtering the red mud mixture, adding NaOH to acidic leachate to adjust its pH to a strongly alkaline level, aging and filtering the leachate, treating filter residue to recover Fe2O3, and refluxing part of alkaline leachate after filtering to the red mud mixture; and adjusting pH of the remaining alkaline leachate after filtering to a weakly acidic level, and conducting filtering to recover aluminum.

公开(公告)号：US11293076B2

公开(公告)日：2022-04-05

申请号：US16822141

申请日：2020-03-18

Applicant: Kunming University of Science and Technology

Inventor： Ping Ning ,  Xueqian Wang ,  Lei Tao ,  Langlang Wang

IPC: B01D53/50 ,  B01D53/78 ,  B03B7/00 ,  C22B1/02 ,  C22B7/00 ,  C22B7/04

Abstract: The present invention discloses a method for preparing iron ore concentrates by recycling copper smelting slag tailings, and belongs to the technical field of metallurgy and tailings recycling. In the present invention, copper slag tailings obtained after copper pyrometallurgy and flotation and water are used as raw materials, and low-concentration sulfur dioxide flue gas is used as a leaching agent for leaching of metals such as iron, zinc, copper, arsenic, and silicon in the slag tailings; the leachate is purified step by step through processes such as replacement by metal iron powder and sulfide precipitation control, to separate zinc, copper, arsenic, etc.; a purified solution is mainly composed of FeSO4 or can be used for producing a ferric salt flocculant; obtained tailings are used to obtain iron ore concentrates through magnetic separation, and the obtained iron ore concentrates can be used for further producing ultra-pure iron ore concentrates.