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Desulfurization and denitration device and technology used for purifying coke oven smoke

A flue gas purification, desulfurization and denitrification technology, applied in the field of coke oven flue gas purification, can solve the problem of high energy consumption, achieve the effects of reducing energy consumption, reducing regeneration frequency, and reducing ammonium sulfate deposition

Active Publication Date: 2016-05-25
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It requires pretreatment and desulfurization in the early stage, and the energy consumption of the denitrification process is relatively high

Method used

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  • Desulfurization and denitration device and technology used for purifying coke oven smoke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A desulfurization, denitrification and regeneration device for coke oven flue gas purification, such as figure 1 shown. The device includes a heat exchanger 1, a desulfurization reactor 2, an SCR denitrification reactor 4 and an ammonia regeneration device 5; the desulfurization reactor 2 and the SCR denitration reactor 4 are provided with a carrying device capable of moving downward, and placed in the carrying device There is granular activated coke and / or activated carbon.

[0053] The desulfurization reactor 2 is a desulfurization tower. The carrying device is the transmission device disclosed in CN103894040A. The transmission device includes a hinge and a transmission wheel, and the transmission wheel is connected to the motor; the hinge is provided with several hinge support platforms, and the distance between each hinge support platform should be greater than the height of the hopper; a pair of hinge support platforms on the hinge should be Be highly consistent...

Embodiment 2

[0061] Use the device described in Example 1 to desulfurize and denitrify coke oven flue gas at a temperature of 190°C, and the coke oven flue gas flow rate: 100,000 m 3 / h, water content: 5%, NO x : 500mg / m 3 , SO 2 : 200mg / m 3 , the specific process of desulfurization and denitrification is as follows:

[0062] Active coke is placed on the supporting devices in the desulfurization reactor 2 and the SCR denitration reactor 4 .

[0063] The coke oven flue gas first passes through the heat exchanger to obtain coke oven flue gas at a temperature of 130°C; after heat exchange, the coke oven flue gas enters the desulfurization reactor 2 through the first air inlet at the bottom of the desulfurization reactor 2, Contact desulfurization with active coke countercurrent under certain conditions, fresh active coke and partially regenerated active coke enter the desulfurization reactor 2 through the solid inlet at the top of the tower, and the active coke moves from top to bottom in...

Embodiment 3

[0067] Use the device described in Example 1 to desulfurize and denitrify coke oven flue gas at a temperature of 200°C, and the coke oven flue gas flow rate: 200,000 m 3 / h, water content: 5%, NO x : 800mg / m 3 , SO 2 : 200mg / m 3 , the specific process of desulfurization and denitrification is as follows:

[0068] Activated carbon is placed on the supporting devices in the desulfurization reactor 2 and the SCR denitrification reactor 4 .

[0069] The coke oven flue gas first passes through the heat exchanger to obtain coke oven flue gas at a temperature of 140°C; after heat exchange, the coke oven flue gas enters the desulfurization reactor 2 through the first air inlet at the bottom of the desulfurization reactor 2, desulfurization by countercurrent contact with activated carbon under certain conditions, fresh activated carbon and partially regenerated activated carbon enter the desulfurization reactor 2 through the solid inlet on the top of the tower, and the activated ca...

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PUM

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Abstract

The invention provides a desulfurization and denitration device and technology used for purifying coke oven smoke. The device comprises a smoke waste heat recovery device, a desulfurization reactor and an SCR denitration reactor in a sequential connection mode. The desulfurization reactor is provided with a first smoke inlet, a first smoke outlet and a bearing device, the SCR denitration reactor is provided with a second smoke inlet, a second smoke outlet and a bearing device, the bearing devices can move downwards, the first smoke inlet and the first smoke outlet enable the coke oven smoke to make countercurrent contact with active coke and / active carbon in the desulfurization reactor, and the second smoke inlet and the second smoke outlet enable the smoke which is subjected to desulfurization treatment to make cross-current contact with active coke and / or active carbon in the SCR denitration reactor. By the utilization of the device, the denitration efficiency reaches 80% or more, the desulfurization efficiency reaches 96% or more, the temperature in the regeneration reaction of active coke can be obviously decreased to 50 DEG C-75 DEG C, and therefore energy consumption is lowered.

Description

technical field [0001] The invention belongs to the technical field of coke oven flue gas purification, and relates to a desulfurization and denitrification device and process for coke oven flue gas purification, in particular to a desulfurization and denitrification device and process for activated coke used for coke oven flue gas purification. Background technique [0002] The coking chemical industry is an industry specializing in the production of metallurgical coke and coking chemical production and recovery. It plays an important role in steel production and is one of the most polluting industries. Its pollutants are continuously discharged from organized elevated point sources. The coke oven flue gas flow rate is generally 100,000-300,000 m 3 / h, temperature at 180-230°C, SO 2 The concentration is 100-300mg / m 3 , NO x The concentration is 400-1200mg / m 3 , compared with traditional coal-fired boiler flue gas, it belongs to low-temperature, low-sulfur and high-nitro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/76B01D53/56
CPCB01D53/0415B01D53/56B01D53/76B01D53/8625B01D2251/2062B01D2253/102B01D2257/30B01D2257/402B01D2257/404B01D2258/0283B01D2259/122Y02C20/10
Inventor 朱廷钰李玉然王斌丁松
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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