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Desulfurization and denitrification system

A technology of desulfurization, denitrification, and discharge port, which is applied in gas treatment, membrane technology, dispersed particle separation, etc. It can solve the problems of uncontrollable materials, large quantity, and difficulty in manual dismantling and maintenance or reinstallation.

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.
[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 12 , 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 denitrification system

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Experimental program
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Embodiment approach

[0137] According to a second embodiment of the present invention, a desulfurization and denitrification system is provided.

[0138]A desulfurization and denitrification system, the system includes an adsorption tower 1, a desorption tower 2, a classifying and screening machine 3, a fourth activated carbon conveyor 7, a fifth activated carbon conveyor 8, a first buffer bin AC1, and a second buffer bin AC2. 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 layer front chamber 101 and an adsorption layer rear chamber 102 . The front chamber 101 of the adsorption layer is arranged on the side close to the flue gas inlet A. The rear cavity 102 of the adsorption layer is arranged on the side close to the flue gas outlet B. The classifying and screening machine 3 includes a classifying and screening machine inlet 301 , a classi...

Embodiment A

[0187] Such as Figure 9 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

[0189] Such as Figure 9 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.

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Abstract

The invention relates to a desulfurization and denitrification system. The system comprises an adsorption tower, a desorption tower, a graded sieving machine, a first activated carbon conveying machine, a second activated carbon conveying machine and a third activated carbon conveying machine, wherein a smoke inlet is formed in one side of the desorption tower; a smoke outlet is formed in the other side of the desorption tower; an adsorption layer front cavity and an adsorption layer rear cavity are formed in the adsorption tower; the first activated carbon conveying machine is connected witha first discharging hole of the graded sieving machine and a feeding hole of the adsorption layer rear cavity; the second activated carbon conveying machine is connected with a second discharging holeof the graded sieving machine and a feeding hole of the adsorption layer front cavity; and the third activated carbon conveying machine is connected with a discharging hole of the adsorption tower and a feeding hole of the desorption tower; and a discharging hole of the desorption tower is connected with a feeding hole of the graded sieving machine. According to the desulfurization and denitrification system, large-particle activated carbon is placed at the rear part of an activated carbon bed layer in the adsorption tower, and small-particle activated carbon is placed at the front part of the activated carbon bed layer in the adsorption tower, so that the situation that activated carbon powder is blown out of the bed layer by smoke can be prevented, and the aim that the smoke dust at theoutlet is reduced can be realized.

Description

technical field [0001] The invention relates to an activated carbon flue gas purification device, which belongs to an activated carbon flue gas purification device suitable for air pollution control, in particular to a desulfurization and denitrification 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 regeneration of activated carbon. [000...

Claims

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Application Information

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IPC IPC(8): B01D53/06
CPCB01D53/06B01D2257/2064B01D2257/302B01D2257/40B01D2258/0283B01D2253/102Y02A50/20
Inventor 魏进超杨本涛李俊杰
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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