CN105457452A - Pipe grid flow equalizing device used for flue gas treatment system - Google Patents

Pipe grid flow equalizing device used for flue gas treatment system Download PDF

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Publication number
CN105457452A
CN105457452A CN201510998934.3A CN201510998934A CN105457452A CN 105457452 A CN105457452 A CN 105457452A CN 201510998934 A CN201510998934 A CN 201510998934A CN 105457452 A CN105457452 A CN 105457452A
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CN
China
Prior art keywords
pipe grid
fluid layer
equal fluid
bank tube
current equalizer
Prior art date
Application number
CN201510998934.3A
Other languages
Chinese (zh)
Inventor
韩玉维
马志刚
江浩
单选户
白云峰
初炜
纳宏波
郭少鹏
刘洋
王德俊
陈雪
刘亚
Original Assignee
北京国能中电节能环保技术有限责任公司
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Application filed by 北京国能中电节能环保技术有限责任公司 filed Critical 北京国能中电节能环保技术有限责任公司
Priority to CN201510998934.3A priority Critical patent/CN105457452A/en
Publication of CN105457452A publication Critical patent/CN105457452A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/18Absorbing units; Liquid distributors therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/54Nitrogen compounds
    • B01D53/56Nitrogen oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/80Semi-solid phase processes, i.e. by using slurries
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/20Reductants
    • B01D2251/206Ammonium compounds
    • B01D2251/2062Ammonia
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/30Sulfur compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/40Nitrogen compounds
    • B01D2257/404Nitrogen oxides other than dinitrogen oxide

Abstract

The invention discloses a pipe grid flow equalizing device used for a flue gas treatment system. The pipe grid flow equalizing device comprises at least two layers of pipe grid flow equalizing layers (100, 200); each pipe grid flow equalizing layer (100, 200) comprises a plurality of grid pipes (310, 320, 330) which are arranged at intervals; a flue gas flow equalizing channel (400) is formed between the adjacent grid pipes (310, 320, 330); each flue gas flow equalizing channel (400) comprises an inlet gradually-narrowing section (410) and an outlet gradually-expanding section (420); and when flue gas flows through the pipe grid flow equalizing layers (100, 200), the venturi effect can be formed. The pipe grid flow equalizing device provided by the invention can be used for effectively improving the flow field uniformity in the flue gas treatment system, improving the distribution of a flow field of the system and improving the efficiency of the system.

Description

A kind of pipe grid current equalizer for smoke processing system

Technical field

The present invention relates to environment-protecting industrial field of fume treatment equipment, particularly relate to a kind of for the flue gas flow equalizing device in flue.

Background technology

In current smoke processing system, flow field is the key factor of influential system efficiency.Such as, for wet desulphurization, absorption tower is the nucleus equipment of desulfurizer, and boiler smoke to enter tower from spray bottom, district and flow forward and tower wall collide, and then upwards flows, with the downward slurries adverse current gas-liquid contact sprayed.In sweetening process, because the sprayed slurry density at tower wall place is low, and have a large amount of flue gas to pass through near wall place, it is uneven that the air flow method of this inequality result in gas-liquid mixed, directly reduces desulfuration efficiency.

In addition, in denitrating system, economizer is to Benitration reactor process flue, and because flow field uniformity is poor, cause ammonia can not fully mix with flue gas, finally enter the ammonia concentration skewness of reactor, denitration efficiency is poor.

Summary of the invention

The object of the present invention is to provide a kind of flow field uniformity that can effectively promote in smoke processing system, improve system flow field distribution, improve the pipe grid current equalizer for smoke processing system of system effectiveness.

For achieving the above object, the concrete technical scheme of a kind of pipe grid current equalizer for smoke processing system of the present invention is:

A kind of pipe grid current equalizer for smoke processing system, comprise the equal fluid layer of at least two-layer pipe grid, many spaced bank tubes are all comprised in every layer of equal fluid layer of pipe grid, flue gas flow equalizing passage is formed between adjacent bank tube, flue gas flow equalizing passage comprises entrance converging transition and outlet divergent segment, can form Venturi effect during the equal fluid layer of flue gas flowing pipe grid.

The advantage of the pipe grid current equalizer for smoke processing system of the present invention is:

Current-sharing pipe grid are made up of ellipse, rhumbatron or hexagonal tube, define entrance convergent and outlet flaring two flue gas stream sections between tube and tube, form venturi type effect, when flue gas flows through this current equalizer, the performance boost of flue gas turbulent flow, thus effectively improve the smoke distribution of flow field regions.

Be applied in desulphurization system absorption tower, greatly will reduce limit wall flue gas escape phenomenon, promote that flue gas fully mixes with slurries, carry out mass-transfer progress effectively, desulfuration efficiency gets a promotion; Be applied in denitrating system, ammonia mixes more even with flue gas, be conducive to the lifting of denitration efficiency.

Accompanying drawing explanation

Fig. 1 is the structural representation of an embodiment of pipe grid current equalizer of the present invention;

Fig. 2 is the concrete structure schematic diagram of the pipe grid in Fig. 1;

Fig. 3 is the concrete structure schematic diagram of the pipe grid in another embodiment of pipe grid current equalizer of the present invention;

Fig. 4 is the concrete structure schematic diagram of the pipe grid in the another embodiment of pipe grid current equalizer of the present invention.

Detailed description of the invention

In order to better understand object of the present invention, structure and function, below in conjunction with accompanying drawing, further detailed description is done to a kind of pipe grid current equalizer for smoke processing system of the present invention.

As shown in Figures 1 to 4, the pipe grid current equalizer for smoke processing system of the present invention comprises the equal fluid layer 100,200 of at least two-layer pipe grid.Wherein, many spaced bank tubes 310,320,330 are all comprised in every layer of equal fluid layer of pipe grid 100,200, flue gas flow equalizing passage 400 is formed between adjacent bank tube 310,320,330, flue gas flow equalizing passage 400 comprises entrance converging transition 410 and outlet divergent segment 420, flue gas flowing pipe grid equal fluid layer 100,200 time can form Venturi effect.

Further, the equal fluid layer of adjacent tubes grid (as shown in Figure 1, comprise the equal fluid layer of the first pipe grid 100 and the equal fluid layer 200 of the second pipe grid) between spacing be preferably 800 ~ 1500mm, and the spacing between the equal fluid layer 100,200 of adjacent tubes grid can adopt identical set or differentiation to arrange.In addition, the bank tube in the equal fluid layer of pipe grid 100,200 can select the pipe of polygon pipe (as rhombus bank tube, hexagonal tube grid), oval bank tube and various shape to combinationally use.

Thus, of the present inventionly to be made up of oval, rhumbatron or hexagonal tube for current-sharing pipe grid in the pipe grid current equalizer of smoke processing system, entrance convergent and outlet flaring two flue gas stream sections are defined between tube and tube, form venturi type effect, when flue gas flows through this current equalizer, the performance boost of flue gas turbulent flow, thus effectively improve the smoke distribution of flow field regions.

As shown in Figure 1 to Figure 2, it is an embodiment of pipe grid current equalizer of the present invention.In this embodiment, the bank tube shape in the equal fluid layer 100,200 of pipe grid is rhombus.

Further, horizontal length (the rhombus horizontal diagonal line length of side) a of rhombus bank tube 310 is preferably 180 ~ 240mm, vertical length (the vertical diagonal length of side of rhombus) b is preferably 120 ~ 180mm, and spacing (rhombus center distance) c between neighboring diamonds bank tube 310 in the equal fluid layer 100,200 of pipe grid can adopt identical set or differentiation to arrange.

Further, when spacing c between the neighboring diamonds bank tube 310 in the equal fluid layer 100,200 of pipe grid adopts identical set, the spacing c between neighboring diamonds bank tube 310 is preferably 2 ~ 2.5 times of the horizontal length a of rhombus bank tube 310, can be 280 ~ 400mm.

Further, when pipe grid current equalizer is arranged on 500 place, flue side entrance, the axis of the rhombus bank tube 310 in the equal fluid layer of pipe grid 100,200 is vertical with the flue gas flow direction at flue side entrance 500 place, and near flue side entrance 500 the equal fluid layer 100 of the first pipe grid in neighboring diamonds bank tube 310 between spacing adopt differentiation arrange.

Specifically, spacing between spacing between the neighboring diamonds bank tube 310 of the close flue side entrance 500 in the equal fluid layer of the first pipe grid 100 is greater than away from the neighboring diamonds bank tube 310 of flue side entrance 500, and the ratio occupied in the equal fluid layer 100 of the first pipe grid of the larger rhombus bank tube 310 of spacing is preferably 1/8-1/2.Wherein, it is further preferred that the spacing that spacing between the neighboring diamonds bank tube 310 of close flue side entrance 500 in the equal fluid layer of the first pipe grid 100 is greater than in the equal fluid layer of all the other pipe grid (as the equal fluid layer of the second pipe grid 200) between adjacent bank tube.

As shown in Figure 3, it is another embodiment of pipe grid current equalizer of the present invention.In this embodiment, the bank tube shape in the equal fluid layer 100,200 of pipe grid is hexagon.

Further, horizontal length (the hexagon horizontal diagonal line length of side) a of hexagon bank tube 320 is 260 ~ 320mm, and vertical length (the vertical diagonal length of side of hexagon) b is 120 ~ 160mm.In addition, in this embodiment, the arrangement form of the hexagon bank tube 320 in the equal fluid layer of pipe grid 100,200 can be same as the previously described embodiments or similar, as between the adjacent hexagons bank tube 320 in the equal fluid layer 100,200 of pipe grid spacing (hexagonal centre spacing) c adopt identical set time, spacing c between adjacent hexagons bank tube 320 is preferably 2 ~ 2.5 times of the horizontal length a of hexagon bank tube 320, can be 500 ~ 600mm.

As shown in Figure 4, it is the another embodiment of pipe grid current equalizer of the present invention.In this embodiment, the bank tube shape in the equal fluid layer 100,200 of pipe grid is oval.

Further, horizontal length (ellipse short shaft diameter) a of oval bank tube 330 is 50 ~ 80mm, and vertical length (transverse diameter) b is 100 ~ 150mm.In addition, in this embodiment, the arrangement form of the oval bank tube 330 in the equal fluid layer of pipe grid 100,200 can be same as the previously described embodiments or similar, as spacing (elliptical center spacing) c between the adjacent ellipses shape bank tube 330 in the equal fluid layer 100,200 of pipe grid adopt identical set time, the spacing c between adjacent ellipses shape bank tube 330 is preferably 2 ~ 2.5 times of horizontal length a of oval bank tube 330.

Further, when the pipe grid current equalizer of this embodiment is arranged in desulfuration absorbing tower, the distance of the immediate spraying layer in the equal fluid layer of pipe grid (the equal fluid layer of the second pipe grid 200) and desulfuration absorbing tower of spraying layer setting is 1500 ~ 2000mm.

Pipe grid current equalizer of the present invention is applied in desulphurization system absorption tower, greatly will reduce limit wall flue gas escape phenomenon, and promote that flue gas fully mixes with slurries, carry out mass-transfer progress effectively, desulfuration efficiency gets a promotion; Be applied in denitrating system, ammonia mixes more even with flue gas, be conducive to the lifting of denitration efficiency.

Specific embodiment:

Pipe grid current equalizer comprises the equal fluid layer of two-layer pipe grid, is applied near the side direction smoke inlet flue in absorption tower.Wherein, the distance between the equal fluid layer of two pipe grid is 1200mm, and the spacing of the equal fluid layer of upper strata pipe grid and orlop spraying layer is 1500mm.

The horizontal diagonal line length of side of the rhombus bank tube in the equal fluid layer of pipe grid is 200mm, and vertical diagonal is 160mm.Simultaneously, rhombus bank tube in the equal fluid layer of upper strata pipe grid and the equal fluid layer of lower floor's pipe grid adopts differentiation arrangement, the center distance of the rhombus bank tube in the equal fluid layer of upper strata pipe grid is 350mm, rhombus bank tube in the equal fluid layer of lower floor's pipe grid is being 300mm away from center distance in 5/6 length range in flue entrance region, and in 1/6 length range near entrance area, center distance is 500mm.

Using practical sulphur removal adsorption tower smoke parameter as benchmark initial conditions, carry out sunykatuib analysis result according to above-mentioned parameters to show, after adding pipe grid current equalizer, in absorption tower, the flue gas flow field uniformity obtains the lifting of 5 percentage points, effectively improve air flow method, flow field is more even, and more fully, adsorption tower smoke desulfuration efficiency is obviously promoted for flue gas and sprayed slurry mixing.

Further describe invention has been by specific embodiment above; but it should be understood that; here concrete description; should not be construed as the restriction to the spirit and scope of the invention; one of ordinary skilled in the art to the various amendments that above-described embodiment is made, belongs to the scope that the present invention protects after reading this specification.

Claims (10)

1. the pipe grid current equalizer for smoke processing system, it is characterized in that, comprise the equal fluid layer (100 of at least two-layer pipe grid, 200), every layer of equal fluid layer (100 of pipe grid, 200) many spaced bank tubes (310 are all comprised in, 320,330), adjacent bank tube (310,320,330) flue gas flow equalizing passage (400) is formed between, flue gas flow equalizing passage (400) comprises entrance converging transition (410) and outlet divergent segment (420), can form Venturi effect time the equal fluid layer of flue gas flowing pipe grid (100,200).
2. the pipe grid current equalizer for smoke processing system according to claim 1, it is characterized in that, the equal fluid layer (100 of adjacent tubes grid, 200) spacing between is 800 ~ 1500mm, and the spacing between the equal fluid layer of adjacent tubes grid (100,200) adopts identical set or differentiation to arrange.
3. the pipe grid current equalizer for smoke processing system according to claim 1, is characterized in that, the shape of the bank tube (310,320,330) in the equal fluid layer of pipe grid (100,200) is polygon or ellipse.
4. the pipe grid current equalizer for smoke processing system according to claim 3, it is characterized in that, the equal fluid layer (100 of pipe grid, 200) the bank tube shape in is rhombus, the horizontal length (a) of rhombus bank tube (310) is 180 ~ 240mm, and vertical length (b) is 120 ~ 180mm.
5. the pipe grid current equalizer for smoke processing system according to claim 3, it is characterized in that, the equal fluid layer (100 of pipe grid, 200) the bank tube shape in is hexagon, the horizontal length (a) of hexagon bank tube (320) is 260 ~ 320mm, and vertical length (b) is 120 ~ 160mm.
6. the pipe grid current equalizer for smoke processing system according to claim 3, it is characterized in that, the equal fluid layer (100 of pipe grid, 200) the bank tube shape in is oval, the horizontal length (a) of oval bank tube (330) is 50 ~ 80mm, and vertical length (b) is 100 ~ 150mm.
7. according to the described pipe grid current equalizer for smoke processing system arbitrary in claim 4 to 6, it is characterized in that, adjacent bank tube (310,320 in the equal fluid layer of pipe grid (100,200), 330) spacing between adopts identical set, and the center distance (c) between adjacent bank tube (310,320,330) is bank tube (310,320,330) 2 ~ 2.5 times of horizontal length.
8. according to the described pipe grid current equalizer for smoke processing system arbitrary in claim 4 to 6, it is characterized in that, pipe grid current equalizer is arranged on flue side entrance (500) place, the equal fluid layer (100 of pipe grid, 200) bank tube (310 in, 320,330) axis is vertical with the flue gas flow direction at flue side entrance (500) place, and the adjacent bank tube (310 in the equal fluid layer of the first pipe grid (100) of flue side entrance (500), 320,330) spacing between adopts differentiation to arrange.
9. the pipe grid current equalizer for smoke processing system according to claim 8, it is characterized in that, the adjacent bank tube (310 of the close flue side entrance (500) in the equal fluid layer of the first pipe grid (100), 320,330) spacing between is greater than the adjacent bank tube (310 away from flue side entrance (500), 320,330) spacing between, and the bank tube (310 that spacing is larger, 320,330) occupied in the equal fluid layer of the first pipe grid (100) ratio is 1/8-1/2.
10. according to the described pipe grid current equalizer for smoke processing system arbitrary in claim 4 to 6, it is characterized in that, pipe grid current equalizer is arranged in desulfuration absorbing tower, and the distance of the immediate spraying layer in the equal fluid layer of the second pipe grid (200) and desulfuration absorbing tower of spraying layer setting is 1500 ~ 2000mm.
CN201510998934.3A 2015-12-28 2015-12-28 Pipe grid flow equalizing device used for flue gas treatment system CN105457452A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102423593A (en) * 2011-08-29 2012-04-25 浙江富春江环保热电股份有限公司 Method for simultaneously dedusting, desulphurizing and denitrating boiler flue gas in coal-fired industry
CN102814119A (en) * 2012-09-11 2012-12-12 上海龙净环保科技工程有限公司 Silicon controlled rectifier (SCR) denitration device of waste gas pre-dedusting ammonia spraying disk in power plant
CN104307352A (en) * 2014-11-18 2015-01-28 上海龙净环保科技工程有限公司 Efficient desulfurization purification efficiency improvement ring and in-tower efficiency improvement structure
CN105107329A (en) * 2015-09-16 2015-12-02 北京国能中电节能环保技术有限责任公司 Efficient desulphurization and dust removal device
CN205435387U (en) * 2015-12-28 2016-08-10 北京国能中电节能环保技术股份有限公司 A pipe bars flow straightener for flue gas processing system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102423593A (en) * 2011-08-29 2012-04-25 浙江富春江环保热电股份有限公司 Method for simultaneously dedusting, desulphurizing and denitrating boiler flue gas in coal-fired industry
CN102814119A (en) * 2012-09-11 2012-12-12 上海龙净环保科技工程有限公司 Silicon controlled rectifier (SCR) denitration device of waste gas pre-dedusting ammonia spraying disk in power plant
CN104307352A (en) * 2014-11-18 2015-01-28 上海龙净环保科技工程有限公司 Efficient desulfurization purification efficiency improvement ring and in-tower efficiency improvement structure
CN105107329A (en) * 2015-09-16 2015-12-02 北京国能中电节能环保技术有限责任公司 Efficient desulphurization and dust removal device
CN205435387U (en) * 2015-12-28 2016-08-10 北京国能中电节能环保技术股份有限公司 A pipe bars flow straightener for flue gas processing system

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Application publication date: 20160406