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Resource utilization system for pellet sintering waste gas and method

A technology for sintering flue gas and recycling it. It is applied in chemical instruments and methods, separation methods, and dispersed particle separation. It can solve the problems of substandard flue gas, no denitration efficiency, and easy wear and tear. effect of investment

Active Publication Date: 2015-11-25
HUATIAN ENG & TECH CORP MCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The disadvantage of rotary spray drying semi-dry desulfurization (SDA) is that there is basically no denitrification efficiency. The atomizer at the top of the desulfurization tower is the core equipment and needs to be imported. Since the rotation speed reaches 15,000rpm, it is easy to wear and needs regular maintenance and replacement. It is used in high concentration (original Flue gas sulfur content greater than 2500mg / Nm 3 ) There is a risk of not meeting the standard when the flue gas is used, and the operating electricity cost is relatively high

Method used

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  • Resource utilization system for pellet sintering waste gas and method
  • Resource utilization system for pellet sintering waste gas and method
  • Resource utilization system for pellet sintering waste gas and method

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Such as Figures 1 to 3 As shown, the sintering pellet flue gas recycling system in this embodiment at least includes a sintering flue gas adsorption system, an active coke analysis and regeneration system, and an active coke transportation device, wherein

[0053] The sintering flue gas adsorption system includes an adsorption tower and an ammonia water storage tank. The adsorption tower is connected to the flue gas outlet of the sintering machine through a sintering flue gas pipeline. Two-stage adsorption tower, the first-stage adsorption tower and the second-stage adsorption tower are equipped with active coke adsorbents, and the ammonia water in the ammonia storage tank is evaporated by a heater to enter the second adsorption tower for ammonia gas, The sintering flue gas passes through the first adsorption tower and the second adsorption tower in turn for flue gas purification, and is discharged through the sintering chimney. The saturated activated coke in the adso...

Embodiment 2

[0064] The sintering pellet flue gas recycling system in this embodiment differs from the sintering pellet flue gas recycling system described in Example 1 only in the structure of the desorption tower, but the working principle and process are the same.

[0065] Such as Figures 6 to 7 As shown, in this embodiment, the desorption tower includes a feeding temporary storage bin 41, an active coke regeneration bin, and an unloading temporary storage bin 422 that are sequentially arranged from top to bottom, wherein the active coke regeneration bin is sequentially arranged from top to bottom It is divided into a feeding straight pipe section 43 , a heating pipe section 411 , a nitrogen-filled excessively feeding pipe section 412 , a cooling pipe section 419 and a discharging straight pipe section 420 .

[0066] Wherein the feeding straight pipe section is provided with an air collecting box 44 outside, and the feeding straight pipe section is provided with a ventilating orifice p...

Embodiment 3

[0076] The process method of sintering pellet flue gas resource utilization in this embodiment, the method at least includes

[0077] Purification of sintering flue gas: the sintering flue gas output from the sintering machine is input into an adsorption tower for purification, wherein the adsorption tower includes a first-stage adsorption tower and a second-stage adsorption tower, and the first-stage adsorption tower, the second-stage adsorption tower Activated coke is respectively arranged in the adsorption tower, and the flue gas passes through the first section of the adsorption tower and the second section of the adsorption tower in turn, and the activated coke in the first section of the adsorption tower will sinter the SO in the flue gas. 2 Adsorption and conversion to generate H 2 SO 4 , stored in the pores of activated coke, ammonia gas is poured into the second adsorption tower, and the activated coke in the second adsorption tower acts as a denitrification low-temp...

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Abstract

The invention discloses a resource utilization system for pellet sintering waste gas and a method. The system at least comprises a sintering waste gas adsorption system, an active-coke desorption regeneration system and an active-coke transportation device; the sintering waste gas adsorption system comprises a first-segment adsorption tower and a second-segment adsorption tower, the sintering waste gas successively passes through the first-segment adsorption tower and the second-segment adsorption tower for waste-gas purification, the gas is discharged through a sintering chimney, and saturated active coke in the adsorption tower is discharged by a saturated-active-coke discharge valve at the bottom of the second-segment adsorption tower; and the active-coke desorption regeneration system comprises a desorption tower, the desorption tower obtains waste gas output by a blast-furnace hot-wind combustion-supporting waste gas discharging port through leading of a hot wind pipeline and takes the waste gas as a deposition hot gas, a vibrating screen disposed at the outlet of the deposition tower is used to screen active coke particles with the diameter of 0.5 cm or less, and an active coke particle bin pump is arranged below sieve pores of the vibrating screen and is communicated with a blast-furnace coal bin via an active coke particle conveying pipe.

Description

technical field [0001] The invention relates to a sintering pellet flue gas resource recovery system and a process method. Background technique [0002] Iron and steel enterprises are one of the main pollution sources of sulfur dioxide, and the emission of sulfur dioxide in the production process of sintering pellets accounts for more than 70% of the total emission of iron and steel enterprises. the key of. [0003] Domestic sintering machines have implemented or are implementing sintering flue gas desulfurization processes mainly include wet process (limestone-gypsum method, magnesium method, ammonia method), dry (semi-dry) desulfurization process, etc. [0004] Wet process (limestone-gypsum method, magnesium method, ammonia method) has significant advantages of low operating cost and high desulfurization efficiency, so it was widely used in early desulfurization systems. However, with the improvement of national environmental protection standards, it is far from enough t...

Claims

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Application Information

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IPC IPC(8): B01D53/81B01D53/50B01D53/76B01D53/56
Inventor 詹茂华陆培兴王浩冯博
Owner HUATIAN ENG & TECH CORP MCC
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