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Active coke/charcoal flue gas desulphurization denitration and elemental sulfur-recovery technology and device

A technology of desulfurization, denitrification, and activated coke, which is applied in the direction of sulfur preparation/purification, separation method, and separation of dispersed particles, which can solve secondary pollution and other problems

Active Publication Date: 2014-08-27
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problem of secondary pollution caused by the small particle activated coke produced by the activated coke desulfurization and denitrification process, in order to achieve high-value recovery of sulfur resources and reduce SO 2 The operating cost of the reduction process, one of the purposes of the present invention is to provide a method of utilizing waste small particle activated coke or / and activated carbon gasification to prepare water gas for reducing SO 2 Process for recovering elemental sulfur

Method used

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  • Active coke/charcoal flue gas desulphurization denitration and elemental sulfur-recovery technology and device
  • Active coke/charcoal flue gas desulphurization denitration and elemental sulfur-recovery technology and device
  • Active coke/charcoal flue gas desulphurization denitration and elemental sulfur-recovery technology and device

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specific Embodiment approach 1

[0057] Such as figure 1 As shown, a device for realizing desulfurization and denitrification of activated coke / charcoal flue gas and recovery of elemental sulfur includes an adsorption tower 2, a screening machine 4, a regeneration tower 3, a gasifier 5 and a reduction tower 6. The bottom solid outlet of the adsorption tower 2 is connected with the top solid inlet of the regeneration tower 3 . The side wall flue gas inlet of the adsorption tower 2 is provided with a dust collector 1, preferably the dust collector 1 is an electric dust collector, and its outlet dust concentration is less than 100mg / Nm 3 . The side wall of the adsorption tower 2 is provided with an ammonia gas inlet and a clean flue gas outlet. The bottom solid outlet of the regeneration tower 3 is connected to the inlet of the screening machine 4 ; the gas outlet of the regeneration tower 3 is connected to the side wall gas inlet of the reduction tower 6 . The sieving machine 4 is provided with two outlets, ...

specific Embodiment 1

[0064] The above-mentioned device is used for desulfurization and denitrification of coal-fired boiler flue gas and steel sintering flue gas, and the specific process parameters are as follows:

[0065] The coal-fired boiler flue gas is discharged into the adsorption tower 2 for desulfurization and denitrification and elemental sulfur recovery processes. Control the temperature of the adsorption 2 tower to be 120°C, the temperature of the gasification furnace 5 to be 900°C, the temperature of the regeneration tower 3 to be 450°C, the temperature of the reduction tower 6 to be 500°C, and the condenser The temperature of 7 is -10°C.

specific Embodiment 2

[0066] The above-mentioned device is used for desulfurization and denitrification of coal-fired boiler flue gas and steel sintering flue gas, and the specific process parameters are as follows:

[0067] The coal-fired boiler flue gas is discharged into the adsorption tower 2 for desulfurization and denitrification and elemental sulfur recovery processes. Control the temperature of the adsorption tower 2 to be 160°C, the temperature of the gasification furnace 5 to be 800°C, the temperature of the regeneration tower 3 to be 300°C, the temperature of the reduction tower 6 to be 600°C, and the condenser The temperature of 7 is 0°C.

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Abstract

The invention discloses an active coke / charcoal flue gas desulphurization denitration and elemental sulfur-recovery technology and device. The technology utilizes active coke / charcoal as an adsorbent and can realize synergetic removal of pollutants in flue gas in an adsorption tower, and the adsorbed active coke / charcoal are fed into a regeneration tower for heat regeneration; the regenerated active coke / charcoal is screened by a screening machine, the active coke / charcoal having large granule sizes is returned to the adsorption tower and then are subjected re-adsorption, and the active coke / charcoal having granule sizes less than 1.5mm is fed into a gasification furnace for water gas synthesis; and the water gas and SO2 obtained by heat regeneration undergo a reaction in a reduction tower to produce elemental sulfur steam, the sulfur steam from the reduction tower is fed into a condenser and then is condensed into sulfur solids, and the non-condensable gas from the top of the condenser is fed into the adsorption tower. The technology and device realize synthesis of water gas from small-granule active coke / charcoal obtained by adsorption-regeneration, realize reduction and enrichment of SO2 thereby preparing elemental sulfur, improve an active coke / charcoal utilization rate and realize high-value recovery of a sulfur resource.

Description

technical field [0001] The invention belongs to the technical field of flue gas pollutant emission control, and relates to a process and device for activated coke / charcoal flue gas desulfurization and denitrification and recovery of elemental sulfur, and specifically relates to activated coke / charcoal generated in the adsorption-thermal regeneration process. Full utilization of small particle activated coke that meets resorption requirements. Background technique [0002] Flue gas pollution emission control technology can be divided into desulfurization technology and denitrification technology according to the different pollutants removed. Flue gas desulfurization technology is mainly aimed at sulfur dioxide (SO 2 ), the removal methods include limestone-gypsum method, ammonia method, circulating fluidized bed method (CFB), rotary spray drying method (SDA), double alkali method and seawater method, etc. Flue gas denitrification technology is aimed at nitrogen oxides (NO ...

Claims

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Application Information

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IPC IPC(8): B01D53/02B01D53/90B01D53/56C01B17/04
Inventor 朱廷钰李玉然丁松李云东叶猛
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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