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An independent dust and mist removal tower composed of two-stage dynamic centrifugal demisters

A technology of a mist eliminator and a mist eliminator, which is applied in the field of combustion flue gas treatment process and comprehensive treatment process, can solve problems such as reducing the moisture content of flue gas.

Active Publication Date: 2018-07-20
张明鑫
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The present invention aims to reduce the influence of desulfurization and denitrification solid products and solutes on smoke dust in the existing wet desulfurization technology, and effectively reduce the moisture content of flue gas; furthermore, it provides a flue gas demister and a comprehensive flue gas treatment process

Method used

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  • An independent dust and mist removal tower composed of two-stage dynamic centrifugal demisters
  • An independent dust and mist removal tower composed of two-stage dynamic centrifugal demisters
  • An independent dust and mist removal tower composed of two-stage dynamic centrifugal demisters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A centrifugal dust and mist remover, comprising a demist tower body 14 with a circular cylinder structure as a whole. The bottom of the demist tower body 14 is provided with a drain port 14-1, and one side of the middle and lower part is provided with a water outlet along the cylinder body. The smoke inlet 14-2 opened in the tangential direction, the top of the demist tower body 14 communicates with the external chimney through the smoke outlet 14-3 and the induced draft fan 18; The gravel section 14-4 connected with the port 14-1, the first-stage suspension demister 14-5 connected with the flue gas inlet 14-2 in the middle, and the second-stage dynamic rotary demister connected with the flue gas outlet 14-3 at the upper part Fogger 14-6 constitutes;

[0044] The first-stage suspension demister 14-5 includes a mist eliminator outer cylinder A1 and a filter inner cylinder A2 arranged around the inner periphery of the mist eliminator outer cylinder. Between the mist elimi...

Embodiment 2

[0050] A comprehensive flue gas treatment process, comprising a double-wet flue gas desulfurization and dust removal process and the fog and dust removal process in Example 1; the double-wet flue gas desulfurization and dust removal process includes a first-level desulfurization and dust removal process A primary desulfurization and dust removal device; a secondary desulfurization and dust removal device for performing secondary desulfurization and dust removal on the flue gas after the primary desulfurization and dust removal treatment; and an ammonia water adding device externally connected to the secondary desulfurization and dust removal device and participating in ammonia desulfurization; Wherein, the first-level desulfurization and dust removal device includes a Venturi dust removal tower 30, a desulfurization pool and a circulation pipeline; the second-level desulfurization and dust removal device includes a clear water spray tower 13, a dust removal pool and a circulatio...

experiment example

[0053] Material preparation:

[0054] Coal used in the test: low calorific value 5000cal / g; volatile matter 28.32%; total sulfur 0.6%; total water 13.25%;

[0055] Ammonia water with a concentration of 25%: 6T;

[0056] Limestone: 1 ton (200 mesh) Calcium oxide: 1 ton (calcium content > 80%) Magnesium oxide: 1 ton (magnesium content > 75%) Egg shell: 1 ton (calcium carbonate content > 80%)

[0057] Boiler model: chain grate quick-install hot water boiler (DZL4.2-1.0 / 110 / 70-AII);

[0058] Venturi dust removal tower: HSCL desulfurization water film dust collector (HSCL1-365T / H);

[0059] Clear water spray tower: adopt the clear water spray tower in embodiment 1

[0060] Mist eliminator: a centrifugal dust and mist eliminator of the present invention

[0061] Inspection instrument: WJ-60B pitot tube parallel automatic smoke and oil sampler (Qingdao Laoshan District Electronic Instrument Co., Ltd.).

[0062] Operation process: start the desulfurization water pump 8 connected ...

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Abstract

The invention relates to a demisting tower comprising two stages of dynamic centrifugal demisters, wherein the demisting tower is manufactured according to the principle of large density difference between air and water and soot particle. The demisting tower comprises a demisting tower body which is integrally in a cylinder structure, a drainage exit is arranged in the bottom part of the demisting tower body, a flue gas inlet is formed in one side of the lower half part of the demisting tower body in the tangential direction of the cylinder, the top part of the demisting tower body is communicated with an external chimney through a flue gas outlet and an induced draft fan, and the demisting tower is characterized in that the demisting tower body comprises a gravel section communicated with the drainage exit at the lower part, a first-stage suspension demister communicated with the flue gas inlet at the middle part, and a second-stage dynamic rotating demister communicated with the flue gas outlet at the upper part. The centrifugal dedusting demisting tower is scientific and reasonable in structure design, and the moisture content of the flue gas subjected to second-stage demisting and dehydrating is extremely low, and meets the flue gas emission standard.

Description

technical field [0001] The invention relates to a combustion flue gas treatment process, in particular to a comprehensive treatment process for flue gas desulfurization, denitrification and dust removal, and belongs to the technical field of combustion exhaust gas treatment. Background technique [0002] Shandong Province is a key air pollutant emission control area. Since September 1, 2013, Shandong Province has promulgated the "Shandong Province Boiler Air Pollutant Emission Standard" to adjust the industrial boiler flue gas emission standard to SO 2 <300mg / m 3 , NO X <400mg / m 3 , Dust<50 mg / m 3 . Upgraded to SO since January 1, 2016 2 <200mg / m 3 NO X <300 mg / m 3 , Dust<20mg / m 3 . Finding an economical and suitable comprehensive flue gas treatment method is an important issue. [0003] Now in the professional division, desulfurization and denitrification and dust removal are divided into two professional sub-items. As the emission standard...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D45/04B01D45/14
CPCB01D45/04B01D45/14
Inventor 张明鑫郭宏恩赵光磊赵晓燕曲红拥孙彩光
Owner 张明鑫