Coke oven gas oxygen analyzer electric catching focal control instrument to obtain detailed information, please call: Zhang Lei: 18392002847 There are other fraudulent circumstances our company and product performance condemned, so the best time to ask the customer to arrange the scene or subject to manufacturers visits). produce tar gas production process in a very small part of the droplets suspended in the gas, and its particle size 1 ~ 7μm. Coal tar fog will be washed in the subsequent gas purification process down into a solution or adsorbed on piping and equipment, resulting in a solution of pollution, reduce the quality of products, equipment and pipeline blockage. An electric Tar safe operation requirements ??? tar fog trapping gas equipment and electrical organic Tar Tar two kinds of currently used mainly electric Tar Tar trapping gas in the fog. Tar electric pole by precipitation can be divided into tubular structures, cellular, concentric and plate types. Tar generate electricity is the use of high-voltage electrostatic interaction under positive and negative, so that the gas in coal tar by fog at the time with the electric Tar, due to the effect of high voltage electric field of trapped down. Because of flammable gas, it is necessary to ensure the safety of electric tar operation. In addition, the inter-electrode electrical Tar corona, spark discharge phenomenon may occur. If the gas is mixed with oxygen, when the mixing ratio of the gas and oxygen to reach the explosion limit will explode. Control 2 ?? ??? gas oxygen content in the gas main source of oxygen in the following aspects, one is due to the production process equipment and piping leaks into the air; the second is gasification gasification agent with excess or short; Third, the gas production process, there will be a certain amount of air into the coal gas. In order to ensure air mixture is mixed with the gas after the explosion limit is not reached, it should be controlled gas oxygen content. "Town Gas Design Code" (GB 50028-2006) provides that when the dry distillation volume percentage of oxygen in the gas is greater than 1%, electricity Tar should send alarm signals. When the volume percentage of oxygen to reach 2%, provided measures should be immediately cut off the power supply. "Industrial enterprises Gas Safety Regulations" (GB 6222-2005) also have this requirement. These provisions are on a volume percentage of oxygen in the gas should not exceed 1% limit. But the more conservative limits, the larger the actual production process operations difficult. 3 ?? gas explosion limit oxygen content and the relationship between different gas explosion limit ??? vary, various artificial gas explosion limits in Table 1. ??? Seen from Table 1, for the coke oven gas, oil, gas and gas upright stove, when the upper reaches of gas explosion limit, the volume percentage of oxygen in the gas 12% to 13.5% (ie, the volume of gas in the air up to 60 percent of can form explosive gas around%) when. And under normal production conditions, the amount of gas in the air can not reach such a high level, so the volume percentage of oxygen in the gas is less than 1 percent of the control targets can be relaxed. For producer gas and water gas, when the gas volume percentage of air to reach about 30% (ie, the volume fraction of the oxygen gas to reach more than 6%) to reach the explosion limit. Explosion limits to the widest water gas, for example, if the control volume percentage of oxygen in the gas ≤3%, equivalent to the volume fraction of gas in the air ≤14. 3%, then from its upper explosive limit (air volume percentage of 29.6% ) is still quite far away, there are quite a large buffer space. Therefore, from the perspective of the explosion limits, control the volume of gas in the percentage of ≤3% oxygen should be safe. For more information, please call: Zhang Lei: 18,392,002,847 (There are other fraudulent circumstances our company and product performance condemned, so the best time to ask the customer if the scene or to arrange factory visits) 4 ?? suggestions ???. the actual production process, controlling the volume percentage of oxygen in the gas is less than 1% is difficult to operate, many companies use volume oxygen disconnecting the control program percentage ≤1%, so frequent power outages parking accidents, affect the subsequent step of normal production. With the improvement of the development of technology, equipment and control technology and operations personnel quality, a considerable part of the business is able to control the volume of gas in the oxygen percentage ≤1%, as several gasworks Shanghai, the coking plant, were able to control the electrical Tar the percentage of oxygen in the gas volume ≤1%. But most domestic enterprises are reflected difficult to control electric Tar volume percentage of oxygen in the gas ≤ 1%, most companies are controlled at 2% to 4%. The actual production run at home and abroad for many years, not because of the oxygen content of the gas is too high incidence of electrical Tar explosion. ??? Domestic and foreign enterprises from the theoretical analysis and years of practice, the control circuit Tar volume percentage of oxygen in the gas ≤3% is feasible. To meet the safety requirements of production, suggests that when the volume of gas in the oxygen percentage ≥2% when the automatic alarm, cut off the power when the volume percentage of oxygen in the gas to reach 3%. For low calorific value gas for carbon monoxide conversion, the volume percentage of oxygen> 0.5% should be automatic alarm, and control the volume percentage of oxygen in the gas ≤1%. This is due to the use of nickel-based catalysts for gas oxygen content requirement. Coke oven gas oxygen content online analytical difficulties: in-line monitoring of all industrial gas, coke oven gas line analysis is the most difficult, the reason is very simple ------ gas in a large number of tar and naphthalene crystals. Coke oven gas oxygen content online analysis solution: a laser in situ oxygen analyzer: that is to be analyzed on a gas pipe openings, and put on the oxygen sensor (some of which are outside the pipeline are two holes, one light emitting device , the other is the receiving device). But in the actual process of using the issue as follows :: 1? Situ instrumentation necessary to install 24-hour high-purity nitrogen (99.999% theory) cleaning must be nitrogen machine, but can not reach ordinary Nitrogen purity, serious affect the measurement results, greater investment cost, and nitrogen cleaning tar and naphthalene crystals basically no effect, can easily cause light pollution. ?? 2 ?? maintenance inconvenient (to remove the cleaning calibration must be very professional, and then install the light source is also very professional), and high maintenance costs. 3 high-purity nitrogen purge ??? measuring results is generally low, the software reliability is questionable compensation. ?? For more information, please call: Zhang Lei: 18,392,002,847 (There are other fraudulent circumstances our company and product performance condemned, so the best time to ask the customer if the scene or to arrange factory visits) two-pass type.? Coke oven gas oxygen analyzer (electrochemical, magnetic oxygen, laser): Remove the gas through the pump, after a multi-stage filter into the gas analyzer measurements accurately and rapidly, invest in small, easy maintenance. Under? Xi'an shaped instrument produced TR-9200-type coke oven gas oxygen analyzer system quality, reliable, easy to maintain, front and rear electric fishing area of ??focus and positive and negative pressure can be installed, opening inconvenient discontinued without further openings, with patented technology (utility patent number: No. 1657273) sampling device, the filtering effect is excellent. For more information, please call: Zhang Lei: 18,392,002,847 (There are other fraudulent circumstances our company and product performance condemned, so the best time to ask the customer if the scene or to arrange factory visits) Ordering Information: To make your order The analyzer is accurate, applicable, please fill out the following: 1, the test group and the actual concentration range. 2, the required measuring range analyzer. 3, the background and the actual concentration of the components contained in the gas. 4, measuring gas is pollution: such as tar fog, dust, corrosive ingredients, moisture content. 5, the temperature monitoring points, the pressure situation. 6, required attachments. 7, other special requirements. For more information, please call: Zhang Lei: 18,392,002,847 (There are other fraudulent circumstances our company and product performance condemned, so the best time to ask the customer if the scene or to arrange factory visits).