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Desulfurization and denitration ammonia-removing system

A technology for desulfurization, denitrification, and recovery systems, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve problems such as maintenance difficulties, material leakage, and increased system operating costs

Active Publication Date: 2018-09-04
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.
[0011] 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 10 , 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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Embodiment approach

[0107] According to the first embodiment provided by the present invention, a desulfurization, denitrification and ammonia removal system is provided.

[0108] A desulfurization, denitrification and ammonia removal system, the system includes an adsorption tower 1, a desorption tower 2, a distributor 3, a first activated carbon conveyor 4, and a second activated carbon conveyor 5. One side of the adsorption tower 1 is provided with a flue gas inlet A. The other side of the adsorption tower 1 is provided with a flue gas outlet B. The adsorption tower 1 is provided with an adsorption chamber 103 and an ammonia removal chamber 104 . The adsorption chamber 103 and the ammonia removal chamber 104 are arranged in parallel in the vertical direction in the adsorption tower 1. The adsorption chamber 103 is arranged on the side close to the flue gas inlet A. The ammonia removal chamber 104 is set on the side close to the flue gas outlet B. The first activated carbon conveyor 4 conne...

Embodiment A

[0137] Such as Figure 7 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 (diameter, D) × 6mm (length, h), then design a kind of sieve to be used in one layer of sieve of vibrating screen 3, wherein the width a and length L of the rectangular sieve hole 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

[0139] Such as Figure 7 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 (diameter, D) × 4mm (length, h), then design a kind of sieve to be used in one layer of sieve of vibrating screen 3, wherein the width a and length L of the rectangular sieve 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.

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Abstract

The invention discloses a desulfurization and denitration ammonia-removing system. The system comprises an adsorption tower, a desorption tower, a distributor, a first activated carbon conveyer and asecond activated carbon conveyer. One side of the adsorption tower is provided with a smoke inlet A, and the other side of the adsorption tower is provided with a smoke outlet B, the interior of the adsorption tower is provided with an adsorption cavity and an ammonia-removing cavity, the adsorption cavity is installed at one side adjacent to the smoke inlet A, the ammonia-removing cavity is installed at one side adjacent to the smoke outlet B, the first activated carbon conveyer is connected with a discharging port of the adsorption tower and a feeding port of the distributor, the second activated carbon conveyer is connected with a discharging port of the desorption tower and a feeding port of the adsorption cavity, a discharging port of the distributor is respectively connected with a feeding port of the ammonia-removing cavity and a feeding port of the desorption tower. The system adopts a mode that the adsorption tower is divided to two functional areas. The adsorption reaction cavity is capable of achieving the functions of desulfurization, denitration, dust removal and the like. The ammonia-removing cavity is filled with fresh activated carbon or acidic activated carbon, andis capable of gathering ammonia in smoke passing through an adsorption reaction layer, and effectively preventing the ammonia at the outlet from escaping.

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, in particular to a desulfurization, denitrification and ammonia removal system 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 regenerati...

Claims

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Application Information

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IPC IPC(8): B01D53/76B01D53/60B01D53/81B01D53/58
CPCB01D53/58B01D53/60B01D53/76B01D53/81B01D2253/102B01D2257/406B01D2251/2062B01D53/50B01D53/56B01D53/75B01D53/83B01D2257/302B01D2257/404B01D2258/0283B01D53/0407Y02A50/20B01D53/02B01D53/96
Inventor 魏进超康建刚李小龙
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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