Silicomanganese furnace tail gas isothermal and sulfur-free transformation technology and system
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An isothermal shift and tail gas technology, applied in the field of warm sulfur-free shift process and system, can solve the problems of long catalyst operation period, easy partial sintering of driving force, etc.
Inactive Publication Date: 2019-01-25
鄂尔多斯市瀚博科技有限公司
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Problems solved by technology
[0007] The purpose of the present invention is to solve the problems existing in the prior art, and provide a method that fundamentally solves the excessive reduction or overheating of the catalyst in the prior art at low steam-to-gas ratio, high-concentration CO conversion, easy partial sintering of the initial driving force, low Sulfur gas first replenishes sulfur and converts to desulfurization. Under the same operating conditions and working conditions, the process flow is simple, the equipment is small, the system resistance, the catalyst operation period is long, the heat recovery rate is high, and the energy-saving effect is good. It is especially suitable for silicomanganese furnaces. Isothermal sulfur-free shift process of tail gas
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Embodiment 1
[0078] Refer to attached figure 1 , the conversion system in this embodiment includes a pretreatment device 8, the input end of the pretreatment device is used to directly connect with the exhaust gas generating device to receive the tail gas produced by the tail gas generating device, and to process the tail gas dust removal;
[0079] The fine desulfurization device 1, the input end of the fine desulfurization device 1 is directly connected with the output end of the pretreatment device 8, and is used to directly receive the raw material gas treated by the pretreatment device 8 and desulfurize it.
[0080] Preferably, the fine desulfurization device is used to remove the total sulfur in the tail gas to below 0.1 ppm.
[0081] Preferably, the conversion system also includes:
[0082] Purification furnace 3, the input end of the purification furnace is connected to the output end of the fine desulfurization device, used to receive the tail gas from the output end of the desul...
Embodiment 2
[0105] This embodiment provides an isothermal sulfur-free transformation process for silicomanganese furnace tail gas, which includes the following steps:
[0106] (1) directly desulfurize the tail gas after dedusting and pressurization;
[0107] (2) Dephosphorize, dechlorinate, defluorinate and deoxygenate the tail gas at the set temperature;
[0108] (3) adjust the steam-gas ratio in the tail gas to carry out the conversion reaction;
[0109] Preferably, step (1) the tail gas of the silicomanganese furnace is pressurized to 0.8Mpag.
[0110] Preferably, step (1) the tail gas of the silicomanganese furnace is pressurized to 2.7Mpag.
[0111] Preferably, step (1) the tail gas of the silicomanganese furnace is pressurized to 3.0Mpag.
[0112] Different pressures can be adopted according to different requirements of transformation reactions. Generally, the driving force of high pressure reaction is relatively large, and the volume of equipment is small, which is beneficial t...
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Abstract
The invention relates to a tail gas isothermal and sulfur-free transformation technology and system. The technology comprises the following step of desulfurization treatment, and in specific cases, the tail gas being subjected to dust removing and compressing is directly desulfurized. The system comprises a pre-treatment device and a fine desulfurization device. The input end of the pre-treatmentdevice is used for being directly connected with a tail gas generation device so as to receive the tail gas generated by the tail gas generation device and conducting dust removing treatment of the tail gas. The input end of the fine desulfurization device is directly connected with the output end of the pre-treatment device and used for directly receiving and desulfurizing the tail gas treated bythe pre-treatment device. The silicomanganese furnace tail gas isothermal and sulfur-free transformation technology and system solve the problems including that a catalyst conducts over reduction ortemperature runaway under a low steam-gas ratio, the high concentration CO is prone to being partly sintered when the original impetus is transformed, the technological procedure is complex, the number of the equipment is large, the life of the catalyst is short, the system resistance is high, and the occupation area is large in the prior art, thoroughly change the transformation technique of a traditional coal chemical industry, and effectively improve the heat recycling efficiency of the device.
Description
technical field [0001] The invention relates to the technical field of gas separation and purification, and is particularly suitable for an isothermal sulfur-free conversion process and system for tail gas of a silico-manganese furnace. Background technique [0002] Silico-manganese production is an industry with high energy consumption and high emissions. At present, the production of silicomanganese mainly adopts closed submerged arc furnace, which melts ore raw materials by electric heating, and then uses carbonaceous reducing agent to reduce silicon, manganese and other elements in the ore, and finally produces silicomanganese alloy products, and at the same time, a large amount of rich Contains CO and H 2 exhaust. According to data, the current total domestic production of silicomanganese is about 12 million tons per year, and the by-product exhaust gas of about 750 Nm per ton of silicomanganese alloy products is produced 3 According to calculation, about 9 billion N...
Claims
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Application Information
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