Calcium carbide furnace exhaust gas purification CO device successfully put into operation

Recently, Xinjiang Tianye Group's 50,000 t/y ethylene glycol project for the synthesis of calcium carbide furnace exhaust gas was formally put into operation. The Beijing PetroChina Pioneer Science and Technology Co., Ltd. designed and constructed the carbon monoxide furnace exhaust gas purification carbon monoxide device and the pressure swing adsorption hydrogen production device for the first time. Success, product gas CO scale is 6000Nm3/h (purity 99%), H2 volume is 16000Nm3/h (purity 99.9%). This marks the first time that the key technologies for separating and purifying CO from the comprehensive utilization of calcium carbide furnace exhaust gas in China have successfully achieved large-scale industrialization applications. It is an innovative achievement of the calcium carbide industry in China in its efforts to implement the comprehensive utilization of tail gas energy and the development of recycling economy, and it has enabled low-carbon production and high efficiency for the calcium carbide industry. New ways to generate income and new ways.

In the initial stage of the project, Peking University Pioneer set up a project team, equipped with meticulous professional technology and management personnel to provide a strong guarantee for the smooth development of the project. After several months of hard work, the project was put into operation on schedule and passed the acceptance test. All the technical indicators were better than the design indicators, achieving a one-time drive success. As of mid-March 2013, the production of the project has been operating stably for more than 70 days, and the purity of the ethylene glycol product has exceeded the national standard for excellent products.

About 70% to 90% of CO in the tail gas of calcium carbide furnace is an extremely valuable resource recognized by the industry. However, because of its complex composition, it is difficult to purify and purify, which has caused great obstacles to the efficient use of tail gas from calcium carbide furnaces. After years of research, Peking University successfully developed a highly efficient CO adsorbent loaded with Cu (No. PU-1), successfully separating N2, CH4 and other impurities from CO in the feed gas. Based on the highly efficient Cu-based adsorbent PU-1, the pressure swing adsorption CO separation technology pioneered by Peking University Pioneer Co., Ltd. has achieved low-cost, large-scale separation of high-purity carbon monoxide (up to 99.9% purity and yield >80%). It is applied to the Xinjiang Tianye calcium carbide furnace tail gas synthesis 50,000 tons/year ethylene glycol project. It has completed the world's first large-scale industrialization device that uses pressure swing adsorption technology to purify CO from calcium carbide furnace tail gas and successfully solved the long-term troubles in the calcium carbide industry. Exhaust gas comprehensive utilization problems.

In recent years, China's pressure swing adsorption has developed into a fairly mature and stable technology. Continuous optimization of the process plan and high-quality and high-efficiency project construction have become the preferred process for gas separation in various fields. Practice shows that the application of pressure swing adsorption in the calcium carbide industry has enabled the efficient use of calcium carbide furnace tail gas, which has greatly promoted the sustainable development of China's calcium carbide industry.

The Hardness Tester is a hardness tester. Metal hardness measurements were first defined by Ray Ommel's definition of hardness, which means that the material resists the ability of a hard object to press into its surface. It is one of the important performance indicators of metal materials. The higher the hardness in general, the better the abrasion resistance.

Hardness test is the simplest and most convenient test method in mechanical performance test. In order to be able to replace certain mechanical properties tests with hardness tests, a more accurate conversion of hardness and strength is required in production.
1. Dietmar Leeb The Leeb hardness is based on the latest Leeb hardness test principle and is designed using state-of-the-art microprocessor technology.
2. Brinell Hardness (HB) Hardened steel balls of a certain size (typically 10 mm in diameter) are pressed onto the surface of the material at a given load (typically 3000 kg) and held for a period of time. After loading, the ratio of the load to its indentation area , which is the Brinell hardness value (HB) in kilograms force/mm2 (N/mm2).
3. Rockwell Hardness (HR) When HB>450 or the specimen is too small, the Brinell hardness test cannot be used instead. It uses a diamond cone with a vertex angle of 120° or a steel ball with a diameter of 1.59 and 3.18 mm to press the surface of the material under test under a certain load. The hardness of the material is obtained from the depth of the indentation. According to the hardness of the test material, divided into three different situations
HRA: It is the hardness obtained with a 60kg load and a diamond cone press. It is used for materials with extremely high hardness (such as cemented carbide, etc.).
HRB: Hardened steel balls with a load of 100kg and a diameter of 1.58mm are used to obtain a hardness that is used for materials with low hardness (such as annealed steel, cast iron, etc.).
HRC: It is the hardness obtained with a 150kg load and a diamond cone press. It is used for materials with high hardness (such as quenched steel, etc.).
4. Vickers hardness (HV) with a load of 120kg or less and a diamond square cone press with a vertex angle of 136° is pressed into the surface of the material. The load value is divided by the surface area of the material indentation pit, which is the Vickers hardness value. (HV).
5 Knoop Hardness (HK)
Suitable for hardness testing of high hardness materials (general hardness measurement above HV1000 hardness).
6. There are Shore hardness tester
7. Wechsler hardness tester (HW)
Suitable for the measurement of Vickers hardness value of aluminum alloy products.
8 plaster hardness tester
Applicable to the measurement of the hardness of building plaster, the steel ball is placed on the test piece, and the depth of the ball mark under the effect of the fixed load is measured, and the plaster hardness of the test piece is calculated.
The above hardness is only a few commonly used, in addition to Shore hardness, Shore hardness, Barcol hardness, Mohs hardness. Practice has shown that there is an approximate correlation between hardness values and strength values between various hardness values of metallic materials. Because the hardness value is determined by the resistance to initial plastic deformation and the resistance to continued plastic deformation, the higher the strength of the material, the higher the resistance to plastic deformation and the higher the hardness value.

Hardness Tester

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