Dry-process dust-removing and dechlorination combined device for blast furnace gas

A dry dust removal and composite device technology, applied in the direction of dust collectors, etc., can solve the problems of corrosion of gas pipelines and auxiliary equipment, waste of waste heat resources of blast furnace gas, and consumption of large water resources, so as to improve reliability, stability and adaptability Strong, high dust removal efficiency

Inactive Publication Date: 2012-07-04
CISDI ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the dust removal methods for blast furnace gas at home and abroad are completed in two stages. The first stage uses inertial dust collectors for coarse dust removal, such as gravity dust collectors or cyclone dust collectors; the second stage mainly includes the following two types of fine dust removal methods: 1) wet Method: This method uses a circular seam scrubber to purify blast furnace gas. Old steel mills also use double-text scrubbers. Wet dust removal has the advantages of mature and reliable systems and low investment, but wet dust removal consumes a lot of water resources, making the bl

Method used

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  • Dry-process dust-removing and dechlorination combined device for blast furnace gas
  • Dry-process dust-removing and dechlorination combined device for blast furnace gas
  • Dry-process dust-removing and dechlorination combined device for blast furnace gas

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Embodiment 1

[0023] Embodiment 1: as figure 1 As shown, the top gas of the blast furnace 1 enters the granular bed dust collector 2 through the pipeline, and the clean blast furnace gas after dedusting, dechlorination, sulfur, ammonia and other impurities is merged into the clean gas pipeline network 7 after being generated by the power generation device 4, such as the power generation device 4 If it is not running, it will be merged into the clean gas pipeline network 7 after passing through the pressure reducing valve group 6.

[0024] The process of dust removal is as follows:

[0025] 1) Blast furnace raw gas (about 200°C) discharged from the top of blast furnace 1 enters granular bed dust collector 2 for dust removal and dechlorination, and the dry ash after dust removal can be directly recycled;

[0026] 2) The dust content of the blast furnace gas after the blast furnace gas dry dedusting and dechlorination composite device is ≤5mg / Nm 3 , the chlorine ion content in the gas conden...

Embodiment 2

[0028] Example 2, such as figure 2 Shown: different from Example 1, the particle bed dust collector 2 is used as a blast furnace gas coarse dust removal device, and then a dry fine dust removal device 8 is additionally provided, and the fine dust removal device 8 is a bag filter, an electric dust collector, Metal dust collector or Shuoyaki plate dust collector.

Embodiment 3

[0029] Example 3, such as image 3 As shown: the difference from Example 2 is that a coarse dust removal device 9 is provided before the granular bed dust collector 2, and the rough dust removal device 2 is a gravity dust collector, a cyclone dust collector or a ceramic high temperature dust collector.

[0030] The present invention adopts blast furnace gas dry dedusting and dechlorination composite device, and introduces a granular bed deduster into the dry dedusting process, which completely retains the advantages of the traditional dry dedusting process, and has the following salient features: Chlorine particles, desulfurization particles, deamination particles and hygroscopic particles, dechlorination, desulfurization, deamination, moisture absorption. The dust removal filter material of the particle bed dust collector can use particles with a particle size of less than 10mm (such as perlite, quartz sand or dust removal ash); the adsorbent can use a composite active compon...

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Abstract

The invention discloses a dry-process dust-removing and dechlorination combined device for blast furnace gas. The device comprises a power generation device and a reducing valve group which are connected to the back of a blast furnace through a pipeline and connected with each other in parallel, and is characterized in that a grain bed dust remover before the power generation device and the reducing valve group is connected in series with the power generation device and the reducing valve group; and dechlorination grains, desulfuration grains and deamination grains are filled in the grain bed dust remover. The device can be used for conducting dust removing, dechlorination, desulfuration, deamination, moisture absorption, and recycling of residual heat and excess pressure on blast furnace gas effectively, and has the advantages as follows: the suitability on ingredient variation of blast furnace gas is high; problems of corrosion on equipment and pipelines and salification caused by dry-process dust removing are solved; and no corrosion-resistant measure is required in pipelines and equipment to follow-up users. The dust content of purified gas at the outlet of the device is 0 to 5 mg/Nm<3>; the chloride ion content in gas condensed water is smaller than 300 mg/L; and the pH value is 6 to 8.

Description

technical field [0001] The invention relates to a gas purification device. technical background [0002] The crude gas produced during blast furnace smelting contains dust and harmful media such as chlorine, sulfur, ammonia, etc. For the treatment of blast furnace gas, it is necessary to meet the requirements of dust removal accuracy (the dust content of purified gas is ≤5mg / Nm 3 ), and to remove chlorine, sulfur, ammonia and other harmful media in the gas, and to recycle the waste heat and pressure of the blast furnace gas as much as possible. [0003] At present, the dust removal methods for blast furnace gas at home and abroad are completed in two stages. The first stage uses inertial dust collectors for coarse dust removal, such as gravity dust collectors or cyclone dust collectors; the second stage mainly includes the following two types of fine dust removal methods: 1) wet Method: This method uses a circular seam scrubber to purify blast furnace gas. Old steel mills a...

Claims

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Application Information

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IPC IPC(8): C21B7/22
Inventor 贾彩清陈君
Owner CISDI ENG CO LTD
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