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NID desulfurization process and cloth bag dust removing device for desulfurization process

A bag filter and desulfurization technology, applied in chemical instruments and methods, dispersed particle separation, dispersed particle filtration, etc., can solve the problems of surface blockage of filter bags, sticking bags, easy adhesion of flue gas, etc., and prolong the service life. , delaying speed, enhancing drying effect

Inactive Publication Date: 2019-04-16
天津市邯津装饰工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the flue gas is directed to the bag filter for circulation treatment, the flue gas will still have relatively high humidity. After entering the bag filter, the flue gas will easily adhere to the surface of the filter bag, causing the surface of the filter bag to be clogged, that is, The "sticky bag" phenomenon

Method used

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  • NID desulfurization process and cloth bag dust removing device for desulfurization process
  • NID desulfurization process and cloth bag dust removing device for desulfurization process
  • NID desulfurization process and cloth bag dust removing device for desulfurization process

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Experimental program
Comparison scheme
Effect test

Embodiment

[0044] Embodiment: a kind of NID desulfurization process and the bag filter for this desulfurization process, such as figure 1 As shown, the NID desulfurization process includes the following steps:

[0045] Step 1: Digest quicklime into calcium dioxide by adding water in digester 1;

[0046] Step 2: Mix the calcium dioxide in the digester 1 and the dust collected in the bag filter 5 in the mixer 2, add water and humidify to form mixed ash;

[0047] The third step: the humidified mixed ash is desulfurized with the flue gas in the boiler 6 in the reactor 3;

[0048] Step 4: The flue gas after the desulfurization reaction in the mixer 2 is returned to the bag filter 5 for circulation and cleaning, and the second and third steps are repeated; the flue gas is preheated before entering the flue gas inlet 52 of the bag filter 5 Treatment, specifically, the flue gas is preheated at the flue gas inlet 52 of the bag filter 5;

[0049] Step 5: The flue gas in the mixer 2 is transport...

Embodiment 2

[0052] Embodiment 2: a kind of NID desulfurization process and the bag filter used for this desulfurization process, differ from embodiment 1 in that, as Figure 4 As shown, a guide pipe 54 is fixedly connected between the preheating passage 53 and the flue gas inlet 52 , and the diameter of the guide pipe 54 gradually decreases toward the flue gas inlet 52 . The guide pipe 54 gradually reduces the flow area before the flue gas enters the flue gas inlet 52, and delays the time for the flue gas to enter the bag filter 5, so that the flue gas can stay in the preheating channel 53 for a longer time and be preheated. The heating of the channel 53 increases the drying time and enhances the drying effect.

Embodiment 3

[0053] Embodiment 3: a kind of NID desulfurization process and the bag filter used for this desulfurization process, differ from embodiment 2 in that, as Figure 5 As shown, the guide tube 54 can also be fixed in the preheating channel 53, thereby reducing the length of the entire structure and reducing the occupied space.

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PUM

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Abstract

The invention discloses a NID desulfurization process and a cloth bag dust removing device for the desulfurization process. The technical scheme of the NID desulfurization process comprises: 1, addingwater to quick lime in a digestion device, and digesting to form calcium dioxide; 2, mixing the calcium dioxide in the digestion device and dust collected in a cloth bag dust removing device in a mixer, and adding water to humidify to form mixed ash; 3, carrying out a desulfurization reaction on the humidified mixed ash in a reactor with flue gas in a boiler; 4, returning the flue gas in the mixer after the desulfurization reaction to the cloth bag dust removing device, cyclically cleaning, and repeatedly performing the steps 2 and 3, wherein pre-heating is performed before the flue gas enters the flue gas inlet of the cloth bag dust removing device; and 5, transporting to an ash warehouse and storing after the flue gas in the mixer is subjected to the desulfurization reaction. Accordingto the present invention, when the flue gas is introduced into the cloth bag dust removing device and is cyclically treated, the possibility that the surface clogging of the filtering bag by the fluegas causes the bag paste can be reduced.

Description

technical field [0001] The invention relates to the field of industrial desulfurization, in particular to an NID desulfurization process and a bag filter used in the desulfurization process. Background technique [0002] With the development of industry and the improvement of people's living standards, the thirst for energy is also increasing, and SO2 in coal-fired flue gas has become the main cause of air pollution. Reducing SO2 pollution has become an urgent task for the governance of atmospheric environment. Many flue gas desulfurization processes have been widely used in industry, especially the NID desulfurization process, which is favored by producers because of its low investment, convenience and feasibility. [0003] The principle of the NID desulfurization process is to use quicklime as a desulfurizer. First, the quicklime is digested into calcium hydroxide powder by adding process water in the digester, and then the calcium hydroxide powder is mixed with a large a...

Claims

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Application Information

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IPC IPC(8): B01D46/02B01D46/42B01D53/26
CPCB01D46/0084B01D46/023B01D46/4263B01D53/26
Inventor 陈永红
Owner 天津市邯津装饰工程有限公司
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