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Desulfurization and denitration device for efficient denitration

A desulfurization, denitrification and denitrification technology, which is applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve problems such as material leakage, increase in system operating costs, and loss of continuous process operation.

Active Publication Date: 2018-08-07
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the round roller feeder often fails during the production process, such as: material leakage when the flue gas pressure changes, and the material cannot be controlled when the machine is stopped.
In addition, the number of round roller feeders is large (as long as one fails, the entire large-scale device has to be shut down), the cost is high, and maintenance is difficult, so it has brought certain restrictions on the development of activated carbon technology.
[0012] Secondly, for the feeding rotary valve in the prior art, there are the following problems: For the transportation of fragile particles such as desulfurization and denitrification activated carbon, the use of rotary valves on the one hand ensures the airtightness of the tower body, and on the other hand realizes the material flow. Transport without damage, but if the conveying medium is sheared due to the rotation of the blades during the conveying process of the rotary valve, see attached Figure 8 , will cause an increase in system operating costs
For a large adsorption tower usually with a height of about 20 meters, the failure of the round roller feeder or the rotary valve during the production process will cause huge losses to the continuous operation of the process, because the adsorption tower is filled with several tons of activated carbon , it is quite difficult to manually dismantle and repair or reinstall, and the impact and loss caused by shutdown are unimaginable

Method used

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  • Desulfurization and denitration device for efficient denitration
  • Desulfurization and denitration device for efficient denitration
  • Desulfurization and denitration device for efficient denitration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0128] like Figure 5 As shown in , the size (screen cut-off size) of the finished activated carbon recycled in the desulfurization and denitrification unit is required to be Then design a kind of screen cloth to be used in the one deck screen cloth of vibrating screen 3, wherein the width a and the length L of the rectangular mesh are: 5mm (width a) * 27mm (length L). Wherein D is the diameter of the circular cross-section of the activated carbon cylinder to be retained on the screen, and h is the minimum length of the granular activated carbon cylinder to be retained on the screen. a=0.833h.

Embodiment B

[0130] like Figure 5 As shown in , the size (screen cut-off size) of the finished activated carbon recycled in the desulfurization and denitrification unit is required to be Then design a kind of screen cloth and be used in the one deck screen cloth of vibrating screen 3, wherein the width a and the length L of the rectangular screen hole are: 3mm (width a) * 27mm (length L). where D is the diameter of the circular cross-section of the granular activated carbon cylinder to be retained on the screen. a=0.75h. This mesh size screen is designed to retain medium particle size activated carbon.

Embodiment C

[0132] like Figure 5 As shown in , the size (screen cut-off size) of the finished activated carbon recycled in the desulfurization and denitrification unit is required to be Then design a kind of screen cloth to be used in one layer of screen cloth of vibrating screen 3, wherein the width a and the length L of rectangular mesh are: 1.6mm (width a) * 16mm (length L). where D is the diameter of the circular cross-section of the granular activated carbon cylinder to be retained on the screen. a=0.75h.

[0133] The adsorption tower generally has at least 2 activated carbon chambers.

[0134] Preferably, there is a circular roller feeder or discharge circular roller G at the bottom of each activated carbon chamber AC-c of the adsorption tower. Generally, the adsorption tower has at least two activated carbon chambers AC-c.

[0135] For the roller feeder or the discharge roller G described here, the roller feeder or the discharge roller G of the prior art can be used, such as ...

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Abstract

The invention relates to a desulfurization and denitration device for efficient denitration. The device comprises an adsorption tower (1), a desorption tower (2), a gas mixer (3), a first activated carbon conveyor (4), a second activated carbon conveyor (5) and an activated carbon material bin (AC) arranged above the adsorption tower (1), wherein a smoke inlet (A) is formed in one side of the adsorption tower (1), a smoke outlet (B) is formed in the other side of the adsorption tower (1), a first gas pipeline (L1) led out from the gas outlet of the gas mixer (3) is connected with the gas inletof the activated carbon material bin (AC), a second gas pipeline (L2) led out from the gas outlet of the gas mixer (3) is connected with the smoke inlet (A), and a third gas pipeline (L3) led out from the gas outlet of the activated carbon material bin (AC) converges with the second gas pipeline (L2). The desulfurization and denitration device provided by the invention adopts activated carbon foradsorbing partial ammonia in advance; meanwhile, partial ammonia is sprayed into the middle part of the adsorption tower again for enhancing a denitration effect.

Description

technical field [0001] The invention relates to an activated carbon method flue gas purification device, which belongs to an activated carbon method flue gas purification device suitable for air pollution control, especially an efficient denitrification ammonia injection device for purification of sintering flue gas, and relates to the field of environmental protection. Background technique [0002] For industrial flue gas, especially sintering machine flue gas in the iron and steel industry, it is ideal to use desulfurization and denitrification devices and processes including activated carbon adsorption towers and desorption towers. In the desulfurization and denitrification devices including activated carbon adsorption tower and desorption tower (or regeneration tower), the activated carbon adsorption tower is used for adsorption of sulfur oxides, nitrogen, and Pollutants including oxides and dioxins, while the desorption tower is used for thermal regeneration of activate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/06B01D53/86B01D53/56B01D53/76
CPCB01D53/06B01D53/76B01D53/8625B01D2257/302B01D2257/40B01D2258/0283B01D2253/102B01D53/56B01D2257/404B01D2251/2062Y02A50/20B01D53/0438B01D53/0446B01D53/86
Inventor 魏进超李俊杰杨本涛
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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