CN209060879U - Flue gas low-temperature wet desulphurization denitrification integrated device and system - Google Patents

Abstract

The utility model relates to technical field of atmospheric pollution control, more particularly to a kind of flue gas low-temperature wet desulphurization denitrification integrated device and system, the integrated apparatus includes the main body of hollow tower structure and the gas inlet device that is connected to the outer wall of main body, body interior is successively arranged mist eliminating zone from top to bottom, spraying zone and liquid storage area, mist eliminating zone is equipped with demister, spraying zone is equipped with the second spraying layer and the first spraying layer from top to bottom, retaining wall is fixed on bottom part body and extends upwardly to the first spraying layer, liquid storage is divided into compound liquid storage area and lye liquid storage area, spray divides into compound spray area and lye spraying zone, baffle plate is arranged in the main body inner wall between compound spray area and the second spraying layer, the exhanst gas outlet in compound spray area is formed with retaining wall, gas bypass device is set on inlet flue duct, form integral system.One tower of desulphurization denitration is completed, and small investment, occupied area is small, and operating cost is low；Without the use of ammonium hydroxide, no blocking, corrosion and poisoning calamity source.

Description

Flue gas low-temperature wet desulphurization denitrification integrated device and system

Technical field

The utility model relates to technical field of atmospheric pollution control more particularly to a kind of flue gas low-temperature wet desulphurization denitrations one Body apparatus and system.

Background technique

With the development of the social economy, the relationship of people's growing interest atmospheric environment and human health, atmospheric environment is administered As the hot spot and focal issue paid close attention at present.From the point of view of gross contamination emission, sulfur dioxide, nitrogen oxides accounting very Height, discharge drastically influence the quality of atmospheric environment.Major part enterprise desulfurizing and denitrifying process is all that subitem carries out at present, is needed More covering devices are built, improvement cannot be effectively cooperateed with, lead to invest that big, long in time limit, the service life is short, operating cost is high, increase enterprise Burden influences the difficulty and progress of efforts at environmental protection propulsion.

Common desulfurization technology mainly has lime stone (lime)/gypsum washing method, Dual alkali, ammonia absorption process, sea water desulfuration Deng technique and equipment are complex, and by-product value is not high.The selectivity that denitration technology is mainly introduced using early stage from foreign countries Catalysis reduction (SCR) or non-selective catalytic reduction (SNCR) method, is all that nitrogen oxides is reduced to nitrogen using ammonia to take off Nitre, ammonia consumption are big, it is difficult to and the escaping of ammonia phenomenon is avoided, secondary pollution is caused, it is serious to upstream device, corrosion of piping, and presence makes With the service life is short, catalyst poisoning, various secondary disasters and hidden danger.

Utility model content

In view of the foregoing defects the prior art has, the flue gas that the utility model proposes a kind of structures simply, without ammonia consumption Low temperature wet process denitration integrated device and system.

The utility model, which is that the following technical solution is employed, to be realized:

A kind of flue gas low-temperature wet desulphurization denitrification integrated device, main body including hollow tower structure and with main body The gas inlet device of outer wall connection, body interior are successively arranged mist eliminating zone, spraying zone and liquid storage area from top to bottom, and mist eliminating zone is set There is demister, spraying zone is equipped with the second spraying layer and the first spraying layer from top to bottom, and retaining wall is fixed on bottom part body and upwardly extends To the first spraying layer, liquid storage is divided into compound liquid storage area and lye liquid storage area, spray divides into compound spray area and lye spray Area is drenched, baffle plate is arranged in the main body inner wall between compound spray area and the second spraying layer, forms compound spray area with retaining wall Exhanst gas outlet.

Further, the upper lateral compound spray area bending setting of the retaining wall.

Further, the compound spray area is greater than the radial section of lye spraying zone.

Further, the compound spray area is 2~3 times of the radial section of lye spraying zone.

Further, the baffle plate covers the upper opening in the compound spray area along the transverse direction of main body, and baffle plate inclines It is arranged obliquely, 90 ° of < of 60 °≤α of angle with main body tower wall.

Further, first spraying layer and the second spraying layer are equipped with several spray tubes for tilting and being installed in parallel, institute It states spray tube and is equipped with several nozzles.

Further, the nozzle is silicon carbide spiral case nozzle.

Further, the mist eliminating zone is equipped with two layers of demister.

A kind of flue gas low-temperature wet desulphurization denitrification integral system, including gas bypass device and foregoing flue gas Low temperature wet process denitration integrated device, the gas bypass device are arranged on the inlet flue duct of the integrated apparatus, The gas bypass device includes branch flue, branch flue control device and inlet flue duct control device.

Further, the branch flue control device is by-passing valve, and inlet flue duct control device is gas inlet valve.

The beneficial effects of the utility model are:

1. one tower of desulphurization denitration is completed, small investment, occupied area is small, and easy to operate, operating cost is low, and reactive absorption tower is sky Deethanizer design, resistance is small, and crushing is small.

2. denitration raw material without danger, and reduces the prior art there are all various safety in transport, deposit, use aspect Hidden danger.

3. using oxidative absorption reduction method, it is without the use of ammonium hydroxide, it is de- reduces blocking, corrosion and poisoning calamity source, desulfurization Nitre carries out at low temperature, is suitable for various Industrial Stoves, the frequent operating condition of smoke temperature change.

4. sulfate or nitrate without secondary pollution, that desulphurization denitration generates, may be reused.

5. system is simple, reliable for operation, long service life, can be run steadily in the long term with effective guarantee system for desulfuration and denitration.

Detailed description of the invention

Fig. 1 is the flue gas low-temperature wet desulphurization denitrification integrated device structural schematic diagram of the utility model.

Fig. 2 is the flue gas low-temperature wet desulphurization denitrification integral system structure diagram of the utility model.

In figure: 1, mist eliminating zone；2, the second spraying layer；3, retaining wall；4, compound spray area；5, lye spraying zone；6, compound storage Liquid zone；7, lye liquid storage area；8, the first spraying layer；9, baffle plate；10, gas inlet device；11, gas inlet valve；12, it bypasses Valve；13, branch flue.

Specific embodiment

In order to which the utility model aim, technical solution is more clearly understood, with reference to the accompanying drawing, the utility model is made It is further described.

Embodiment one

As shown in Figure 1, the utility model provides a kind of flue gas low-temperature wet desulphurization denitrification integrated device, including hollow The main body of tower structure and the gas inlet device 10 being connected to the outer wall of main body, body interior is successively arranged removes from top to bottom Fog-zone 1, spraying zone and liquid storage area, mist eliminating zone 1 are equipped with demister, and spraying zone is equipped with the second spraying layer 2 and the first spray from top to bottom Drenching layer 8, retaining wall 3 are fixed on bottom part body and extend upwardly to the first spraying layer 8, and liquid storage is divided into compound liquid storage area 6 and lye Liquid storage area 7, spray divide into compound spray area 4 and lye spraying zone 5, and the setting of baffle plate 9 sprays in compound spray area 4 and second In main body inner wall between layer 2, the exhanst gas outlet in compound spray area 4 is formed with retaining wall 3.

Retaining wall 3 is fixed on the top that bottom part body extends upwardly to the first spraying layer 8, and principal space is divided into compound spray 5 two regions in area 4 and lye spraying zone, flue gas is introduced into compound spray area 4 and carries out first time spray-absorption, through exhanst gas outlet Second of spray-absorption is carried out into lye spraying zone 5, flow path of the flue gas in tower is increased, realizes flue gas same The purpose of simultaneous SO_2 and NO removal in equipment.

Further, the upper lateral compound spray area bending setting of the retaining wall, prevents flue gas is too fast from passing through compound spray Area 4 promotes flue gas to enter lye spraying zone 5 after compound spray area 4 fully absorbs reaction.

Further, the compound spray area 4 is greater than the radial section of lye spraying zone 5.Due to the flue gas stream having just enter into It is fast fast, by increasing the radial section in compound spray area 4, so that the flue gas into device sufficiently carries out first time spray-absorption, Second spraying layer 2 is arranged on compound spray area 4, enables flue gas sufficiently to carry out second of spray-absorption, makes simultaneously Liquid after obtaining second of spray-absorption enters lye liquid storage area 7 by lye spraying zone 5, to make to reduce lye spraying zone 5 Space be possibly realized.

Further, the compound spray area 4 is 2~3 times of the radial section of lye spraying zone 5, to preferably mention High denitrification efficiency.

Further, baffle plate 9 is arranged diagonally downward, and the angular range with main body inner wall is 90 ° of 60 °≤α <, to keep away The spray liquid for exempting from the second spraying layer 2 generates hydrops on baffle plate 9, make the spray liquid of the second spraying layer 2 along 9 dispatch of baffle plate extremely Lye spraying zone 5；The setting height for reducing baffle plate 9, reduces the air drag of exhanst gas outlet.Baffle plate 9 is along main body The upper opening in the compound spray area 4 is laterally covered, so that the horizontally or obliquely lower setting of the exhanst gas outlet in compound spray area 4, Flue gas i.e. from compound spray area 4 is horizontally or obliquely lower into lye spraying zone 5, not only can guarantee the path for increasing flue gas, but also It can prevent the spray liquid of the second spraying layer 2 from entering compound spray area 4.

Further, first spraying layer 8 and the second spraying layer 2 are equipped with several spray tubes for tilting and being installed in parallel, The spray tube is equipped with several nozzles, consequently facilitating the first spraying layer 8 and the flexibly disassembly maintenance, cleaning of the second spraying layer 2, often Root spray tube is flanged joint.

Further, the nozzle is silicon carbide spiral case nozzle, the slurries that this kind of nozzle sprays under lower pressure drop Spray angle is accurate and atomizing effect is good, and improves the spray efficiency of slurries, and nozzle is compact to design, under intended size To maximum stream flow, smooth channel design largely avoids choking phenomenon, has not only guaranteed the stability of operation, but also improve Service life and spray efficiency.

Further, the mist eliminating zone 1 is equipped with two layers of demister, guarantees that flue gas emission droplet concentration is less than 75mg/m³, from And enable flue gas low-temperature wet desulphurization denitrification integrated device continuous and steady operation.

The utility model flue gas enters integrated apparatus main body by gas inlet device 10, sprays first through the first spraying layer 8 Oxidizing sulfur dioxide is sulfuric acid in compound spray area 4 by leaching, is nitrogen dioxide by oxidation of nitric oxide, to remove titanium dioxide Sulphur, flue gas enters lye spraying zone 5 via exhanst gas outlet after reaction, and the lye through the second spraying layer 2 further sprays, reaction life At sulfate or nitrate, to realize integration desulfurization denitration.

Embodiment two

As shown in Fig. 2, the utility model provides a kind of flue gas low-temperature wet desulphurization denitrification integral system, including flue gas Shunting device and the flue gas low-temperature wet desulphurization denitrification integrated device, the gas bypass device are arranged in integration On the inlet flue duct of device, the gas bypass device includes branch flue 13, branch flue control device and inlet flue duct control Whether device processed, the branch flue control device control flue gas enter branch flue 13, the inlet flue duct control device control Whether tobacco curing gas enters the integrated apparatus.

The inlet flue duct control device is gas inlet valve 11, and the branch flue control device is by-passing valve 12.

When operating normally, gas inlet valve 11 is opened, and by-passing valve 12 is closed, and flue gas is carried out into the integrated apparatus Desulphurization denitration processing.When the integrated apparatus breaks down, the integrated apparatus is stopped transport, and closes gas inlet valve 11, By-passing valve 12 is opened, flue gas enters branch flue 13, to carry out system overhaul, and improves safety in operation.

The by-passing valve 12 and gas inlet valve 11 are controlled by electric operator, to guarantee by-passing valve 12 and flue gas The quick unlatching and adjusting of inlet valve 11.

The by-passing valve 12 and gas inlet valve 11 are equipped with sealing element, guarantee that flue gas does not leak to branch flue 13 or one Body makeup is set, to reduce flue gas leakage, and improves system safety in operation and stability.

Inlet flue duct control device described in the utility model and branch flue control device can be other control flues The device of opening and closing, such as flue control baffle, and the utility model is without being limited thereto.

Compound spray area 4 described in the utility model and lye spraying zone 5 are the names of the two spaces separated to retaining wall 3 The restriction of title.

First, second is only the restriction carried out to the title of spraying layer described in the utility model, is not to spray The restriction that the setting of layer successively carries out.

All technical and scientific terms used in the utility model have the common skill with the application technical field The normally understood identical meanings of art personnel.

It should be noted that term used in the utility model is merely to describe specific embodiment, and be not intended to Limit the illustrative embodiments according to the application.Unless the context clearly indicates otherwise, otherwise singular be also intended to include Plural form, additionally, it should be understood that, when the term " comprising " and/or " including " is used in this specification, indicate Existing characteristics, step, operation, device, component and/or their combination.

The above is only the preferred embodiment of the present invention and oneself, not with the utility model be limitation, it is all this Made impartial modifications, equivalent substitutions and improvements etc., should be included in the utility model within the spirit and principle of utility model Patent covering scope in.

Claims (10)

1. a kind of flue gas low-temperature wet desulphurization denitrification integrated device, which is characterized in that the main body including hollow tower structure with And the gas inlet device (10) being connected to the outer wall of main body, body interior are successively arranged mist eliminating zone (1), spraying zone from top to bottom And liquid storage area, mist eliminating zone (1) are equipped with demister, spraying zone is equipped with the second spraying layer (2) and the first spraying layer (8) from top to bottom, Retaining wall (3) is fixed on bottom part body and extends upwardly to the first spraying layer (8), and liquid storage is divided into compound liquid storage area (6) and lye Liquid storage area (7), spray divide into compound spray area (4) and lye spraying zone (5), and baffle plate (9) is arranged in compound spray area (4) In main body inner wall between the second spraying layer (2), the exhanst gas outlet of compound spray area (4) is formed with retaining wall (3).

2. flue gas low-temperature wet desulphurization denitrification integrated device as described in claim 1, which is characterized in that the retaining wall (3) Upper lateral compound spray area (4) bending setting.

3. flue gas low-temperature wet desulphurization denitrification integrated device as described in claim 1, which is characterized in that the compound spray Area (4) is greater than the radial section of lye spraying zone (5).

4. flue gas low-temperature wet desulphurization denitrification integrated device as claimed in claim 3, which is characterized in that the compound spray Area (4) is 2~3 times of the radial section of lye spraying zone (5).

5. flue gas low-temperature wet desulphurization denitrification integrated device as described in claim 1, which is characterized in that the baffle plate (9) upper opening that the compound spray area (4) is covered along the transverse direction of main body, is arranged, the angle with main body tower wall diagonally downward 90 ° of 60 °≤α <.

6. flue gas low-temperature wet desulphurization denitrification integrated device as described in claim 1, which is characterized in that first spray Layer (8) and the second spraying layer (2) are equipped with several spray tubes for tilting and being installed in parallel, and the spray tube is equipped with several nozzles.

7. flue gas low-temperature wet desulphurization denitrification integrated device as claimed in claim 6, which is characterized in that the nozzle is carbon SiClx spiral case nozzle.

8. flue gas low-temperature wet desulphurization denitrification integrated device as described in claim 1, which is characterized in that the mist eliminating zone (1) it is equipped with two layers of demister.

9. a kind of flue gas low-temperature wet desulphurization denitrification integral system, which is characterized in that including gas bypass device and as weighed Benefit requires flue gas low-temperature wet desulphurization denitrification integrated device described in 1~8 any one, and the gas bypass device setting exists On the inlet flue duct of the integrated apparatus, the gas bypass device includes branch flue (13), branch flue control device With inlet flue duct control device.

10. flue gas low-temperature wet desulphurization denitrification integral system as claimed in claim 9, which is characterized in that the branch cigarette Road control device is by-passing valve (12), and inlet flue duct control device is gas inlet valve (11).