CN209663014U - Boiler tail flue gas desulfurization dust-removal system - Google Patents

Abstract

The utility model provides a kind of boiler tail flue gas desulfurization dust-removal system, wherein connection flue path connects wet scrubber, sodium hydroxide solution tank is arranged at intervals in connection flue by the first multiple spray equipments of liquid driving device piping connection, multiple spray equipments along the axis direction of connection flue.Preferably, further including flocculant solution tank, the overflow launder of piping connection wet scrubber.It further include the settling tank of second liquid driving device, filtered water tank and multiple series connections, overflow launder passes through the first liquid driving device of second liquid driving device and filtered water tank piping connection by settling tank piping connection filtered water tank, sodium hydroxide solution tank.The boiler tail flue gas desulfurization dust-removal system of the utility model can be to boiler tail flue gas desulfurization and dedusting, and is suitable for desulfurization, cleaner transformation of the boiler tail equipped with wet scrubber, and ingenious in design, simple for structure, manufacture is easy, at low cost.

Description

Boiler tail flue gas desulfurization dust-removal system

Technical field

The utility model relates to boiler technology fields, in particular to boiler tail flue gas processing system technical field, specifically Refer to a kind of boiler tail flue gas desulfurization dust-removal system.

Background technique

Boiler is a kind of energy conversion, and the energy inputted to boiler has chemical energy, electric energy in fuel, boiler output Steam, high-temperature water or organic heat carrier with certain thermal energy.

The hot water or steam generated in boiler directly can provide required thermal energy for industrial production and people's lives, can also pass through Steam Power Equipment is converted to mechanical energy, or converts mechanical energy into electric energy by generator again.The boiler for providing hot water is known as Hot-water boiler is mainly used for living, and also has a small amount of application in industrial production.The boiler for generating steam is known as steam boiler, Chang Jian Referred to as boiler is chiefly used in thermal power station, ship, locomotive and industrial and mining enterprises.

The flue gas that the tail portion of the boiler of old boiler room generates generallys use wet scrubber dedusting, as shown in Figure 1, boiler 15 by connection 1 piping connection wet scrubber 2 of flue, and the overflow launder 7 of wet scrubber 2 is connect with pit 8 is removed, wet dust removal Pit 8 is removed by manual 9 piping connection of ash-valve in the bottom of device 2, and the top of wet scrubber 2, chimney is arranged in air-introduced machine 16 17 with 16 air circuit connection of air-introduced machine.In use, the flue gas that the tail portion of boiler 15 generates enters wet scrubber by connection flue 1 2, treated flue gas introduces chimney 17 through air-introduced machine 16, is discharged into atmosphere.Overflow launder 7 is used to control the water in wet scrubber 2 Position, water level is high, and water is flowed out from overflow launder 7, flows into and removes pit 8.But also contain by the flue gas that wet scrubber 2 is handled There are the harmful substances such as sulfur dioxide, be directly discharged into atmosphere and pollute the environment, therefore, it is also desirable to carry out desulfurization process to flue gas.

There are several types of 1, rotating stream tray scrubber desulfurization, dedusting for widely used desulfurization both at home and abroad at present, dust removal integrated technology Integration has multi-layer desulfurization dust-extraction unit in tower, and multilayer dehydrating demisting device is arranged at top, and blowdown, flue gas and alkaline water are arranged at bottom Under tower internal tangent and the effect of multi-layer desulfurization device guiding, the flue gas of purification rises, and the dust of cohesion declines discharge.2, wet process is quiet Electric precipitation, desulfurization integrated, electrostatic precipitation and absorption tower are in a housing, the desulfurization of tower lower part, top dedusting.3, dry desulfurization It is dust removal integrated, desulfurization is realized by spraying white lime dry powder and reactant into the flue gas containing dust and sulfur dioxide, The solid-state calcium sulfate of formation is attached on dust or is condensed into fine particle, is collected with dust by sack cleaner. But above several desulfurization, dust removal integrated equipment are invested, are run, the problem that maintenance cost is high, more all in the presence of taking up a large area It is not suitable with old boiler room transformation.

Accordingly, it is desirable to provide a kind of boiler tail flue gas desulfurization dust-removal system, can remove boiler tail flue gas desulfurization Dirt, and it is suitable for desulfurization, cleaner transformation of the boiler tail equipped with wet scrubber.

Utility model content

In order to overcome the disadvantages of the prior art mentioned above, one of the utility model is designed to provide a kind of boiler tail Flue gas desulfurization dust-removal system, can be to boiler tail flue gas desulfurization and dedusting, and is suitable for boiler tail equipped with wet scrubber Desulfurization, cleaner transformation, are suitable for large-scale promotion application.

The another object of the utility model is to provide a kind of boiler tail flue gas desulfurization dust-removal system, ingenious in design, Simple for structure, manufacture is easy, at low cost, is suitable for large-scale promotion application.

To achieve the above objectives, the utility model provides a kind of boiler tail flue gas desulfurization dust-removal system, including connection cigarette Road and wet scrubber, the connection flue path connect the wet scrubber, its main feature is that, the boiler tail flue gas is de- Sulphur dust pelletizing system further includes sodium hydroxide solution tank, the first liquid driving device and multiple spray equipments, and the sodium hydroxide is molten Flow container is by the multiple spray equipments of the first liquid driving device piping connection, and multiple spray equipments are along the company The axis direction in cigarette receiving road is arranged at intervals in the connection flue.

Preferably, the number of first liquid driving device is identical as the number of the spray equipment, first liquid Body drive and the spray equipment correspond piping connection.

Preferably, the number of the spray equipment is 2,2 spray equipments are respectively I grades of spray equipments and II grades Spray equipment, the I grades of spray equipment and the II grades of spray equipment are arranged along the axis direction interval of the connection flue In the connection flue.

Preferably, the spray equipment uses spiral nozzle.

Preferably, the sodium hydroxide solution tank is sodium hydroxide agitator tank.

Preferably, the boiler tail flue gas desulfurization dust-removal system further includes flocculant solution tank, the flocculant solution The overflow launder of wet scrubber described in tank piping connection.

More preferably, the flocculant solution tank is flocculant agitator tank.

Preferably, the boiler tail flue gas desulfurization dust-removal system further includes second liquid driving device, filtered water tank and more A settling tank, multiple settling tanks are connected in series, and the overflow launder of the wet scrubber passes through multiple precipitating water Filtered water tank described in case piping connection, the sodium hydroxide solution tank pass through clear described in the second liquid driving device piping connection Water tank, the first liquid driving device described in the filtered water tank piping connection.

More preferably, the number of the settling tank is 3, and 3 settling tanks are respectively level-one settling tank, second level Settling tank and three-level settling tank, level-one settling tank described in the overflow launder piping connection, the level-one settling tank are logical Cross three-level settling tank described in the two-stage precipitation water tank piping connection, clear water described in the three-level settling tank piping connection Case.

More preferably, the boiler tail flue gas desulfurization dust-removal system further includes moisturizing pipeline, and the moisturizing pipeline pipeline connects Connect the filtered water tank.

The beneficial effects of the utility model essentially consist in:

1, the boiler tail flue gas desulfurization dust-removal system of the utility model includes connection flue, wet scrubber, hydroxide Sodium solution tank, the first liquid driving device and multiple spray equipments, connection flue path connect wet scrubber, and sodium hydroxide is molten Flow container passes through the first multiple spray equipments of liquid driving device piping connection, axis direction of multiple spray equipments along connection flue It is arranged at intervals in connection flue, so that boiler tail flue gas is sprayed by sodium hydroxide solution before wet scrubber, then , therefore, can be to boiler tail flue gas desulfurization and dedusting into wet scrubber processing, and be suitable for boiler tail and removed equipped with wet type Desulfurization, the cleaner transformation of dirt device, are suitable for large-scale promotion application.

2, the boiler tail flue gas desulfurization dust-removal system of the utility model includes connection flue, wet scrubber, hydroxide Sodium solution tank, the first liquid driving device and multiple spray equipments, connection flue path connect wet scrubber, and sodium hydroxide is molten Flow container passes through the first multiple spray equipments of liquid driving device piping connection, axis direction of multiple spray equipments along connection flue It is arranged at intervals in connection flue, so that boiler tail flue gas is sprayed by sodium hydroxide solution before wet scrubber, then Therefore, ingenious in design into wet scrubber processing, simple for structure, manufacture is easy, at low cost, answers suitable for large-scale promotion With.

The these and other objects of the utility model, feature and advantage, by following detailed descriptions, attached drawing and right are wanted It acquires to fully demonstrate, and can be achieved by means, device and the their combination specially pointed out in appended claims.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of boiler tail flue gas dust removal system of the existing boiler tail equipped with wet scrubber, Arrow indicates fluid flow direction.

Fig. 2 is the structural schematic diagram of a specific embodiment of the boiler tail flue gas desulfurization dust-removal system of the utility model, Arrow indicates fluid flow direction.

(symbol description)

1 connection flue；2 wet scrubbers；3 sodium hydroxide solution tanks；4 first liquid driving devices；5 spray equipments；6 waddings Solidifying agent solution tank；7 overflow launders；8 remove pit；9 manual ash-valves；10 second liquid driving devices；11 filtered water tanks；12 precipitating water Case；13 filter screens；14 moisturizing pipelines；15 boilers；16 air-introduced machines；17 chimneys.

Specific embodiment

In order to be more clearly understood that the technology contents of the utility model, spy lifts following embodiment and is described in detail.

It please refers to shown in Fig. 2, in a specific embodiment of the utility model, the boiler tail flue gas of the utility model is de- Sulphur dust pelletizing system includes connection flue 1, wet scrubber 2, sodium hydroxide solution tank 3, the first liquid driving device 4 and multiple sprays Shower device 5, wet scrubber 2 described in 1 piping connection of connection flue, the sodium hydroxide solution tank 3 pass through described first The multiple spray equipments 5 of 4 piping connection of liquid driving device, axis of multiple spray equipments 5 along the connection flue 1 Direction is arranged at intervals in the connection flue 1.

The number of first liquid driving device 4 can be identical as the number of the spray equipment 5, can also be different, Please refer to shown in Fig. 2, in a specific embodiment of the utility model, the number of first liquid driving device 4 with it is described The number of spray equipment 5 is identical, and first liquid driving device 4 corresponds piping connection with the spray equipment 5.

The number of the spray equipment 5 can according to need determination, preferably, the number of the spray equipment 5 be 2,2 A spray equipment 5 is respectively I grades of spray equipments and II grades of spray equipments, and the I grades of spray equipment and described II grades are sprayed Device is arranged at intervals in the connection flue 1 along the axis direction of the connection flue 1.It please refers to shown in Fig. 2, in this reality It is identical as the number of the spray equipment 5 in the number of first liquid driving device 4 in a novel specific embodiment In the case where, the number of first liquid driving device 4 is also 2, and 2 first liquid driving devices 4 distinguish pipeline Connect the I grades of spray equipment and the II grades of spray equipment.

The spray equipment 5 can use the nozzle of any suitable shape, in a specific embodiment of the utility model, The spray equipment 5 uses spiral nozzle.

The sodium hydroxide solution tank 3 can be any suitable alkaline solution tank, in order to prepare sodium hydroxide solution, In In one specific embodiment of the utility model, the sodium hydroxide solution tank 3 is sodium hydroxide agitator tank.

First liquid driving device 4 can be any suitable liquid driving device, in a tool of the utility model In body embodiment, first liquid driving device 4 is Sprayer Circulation pump.

In order to enable the dirt rapid condensation in sewage to be discharged, please refer to shown in Fig. 2, in a specific implementation of the utility model In example, the boiler tail flue gas desulfurization dust-removal system further includes flocculant solution tank 6, and 6 pipeline of flocculant solution tank connects Connect the overflow launder 7 of the wet scrubber 2.

The flocculant solution tank 6 can be any suitable flocculant solution tank, in order to prepare flocculant solution, at this In one specific embodiment of utility model, the flocculant solution tank 6 is flocculant agitator tank.

In order to facilitate the sludge for the bottom for clearing up the wet scrubber 2, please refer to shown in Fig. 2, in the utility model In one specific embodiment, the boiler tail flue gas desulfurization dust-removal system further includes removing pit 8 and manual ash-valve 9, described wet The bottom of formula deduster 2 is by removing pit 8 described in manual 9 piping connection of ash-valve.

For the ease of overhauling the flocculant solution tank 6, please refer to shown in Fig. 2, in a specific implementation of the utility model In example, the bottom of the flocculant solution tank 6 is by removing pit 8 described in other manual 9 piping connection of ash-valve.

For the ease of overhauling the sodium hydroxide solution tank 3, please refer to shown in Fig. 2, one in the utility model is specific real It applies in example, the bottom of the sodium hydroxide solution tank 3 is by removing pit 8 described in other manual 9 piping connection of ash-valve.

In order to recycle the water that the overflow launder 7 of the wet scrubber 2 flows out, please refer to shown in Fig. 2, originally practical new In one specific embodiment of type, the boiler tail flue gas desulfurization dust-removal system further includes second liquid driving device 10, clear water Case 11 and multiple settling tanks 12, multiple settling tanks 12 are connected in series, and the overflow launder 7 of the wet scrubber 2 passes through Filtered water tank 11 described in multiple 12 piping connections of the settling tank, the sodium hydroxide solution tank 3 are driven by the second liquid Move filtered water tank 11 described in 10 piping connection of device, the first liquid driving device 4 described in 11 piping connection of filtered water tank.

It in order to facilitate the precipitating cleared up in the settling tank 12, please refers to shown in Fig. 2, one in the utility model is specific In embodiment, the bottom of multiple settling tanks 12 described in other manual 9 piping connection of ash-valve respectively by removing Pit 8.

In order to filter floater, please refer to shown in Fig. 2, it is described heavy in a specific embodiment of the utility model Filter screen 13 is provided between shallow lake water tank 12 and between the settling tank 12 and the filtered water tank 11.

The second liquid driving device 10 can be any suitable liquid driving device, in a tool of the utility model In body embodiment, the second liquid driving device 10 is sodium hydroxide solution pump.

The number of the settling tank 12 can according to need determination, please refer to shown in Fig. 2, in a tool of the utility model In body embodiment, the number of the settling tank 12 is 3, and 3 settling tanks 12 are respectively level-one settling tank, second level Settling tank and three-level settling tank, level-one settling tank described in 7 piping connection of overflow launder, the level-one settling tank are logical Cross three-level settling tank described in the two-stage precipitation water tank piping connection, filtered water tank described in the three-level settling tank piping connection 11。

The settling tank 12 can be the settling tank with any suitable shape, and one in the utility model is specific real It applies in example, the settling tank 12 is cone bucket formula settling tank.

In use, boiler 15 is removed by connection flue 1 into wet type with 1 piping connection of flue, boiler tail flue gas is connect Dirt device 2, before entering wet scrubber 2, the sodium hydroxide concentrate stirred by sodium hydroxide agitator tank is in hydroxide Enter the dilution of filtered water tank 11 under the driving of sodium solution pump, is then pumped into I grades of spray equipments and II respectively by 2 Sprayer Circulation pumps Grade spray equipment, sprays through spiral nozzle, forms the sodium hydroxide water mist of all standing, pass through sodium hydroxide in boiler tail flue gas It comes into full contact with, wash with sodium hydroxide water mist when water mist, boiler tail flue gas passes through I grades of spray equipments and II grades of spray equipment collection Entering after wet scrubber 2 is handled again after middle spray washing and enters air-introduced machine 16, cleaning flue gases are discharged into atmosphere by chimney 17, The manual ash-valve 9 of bottom of the sludge washed through wet scrubber 2 is expelled to except pit 8.

Entered in the overflow launder 7 of wet scrubber 2 by the flocculant solution that flocculant agitator tank stirs into, flocculant is molten Liquid is mixed with waste water, so that it is played maximum flocculation, by the suspended matter coagulating sedimentation in sewage.

The water that the overflow launder 7 of wet scrubber 2 flows out enters level-one settling tank precipitating, and supernatant is flowed by filter screen 13 Two-stage precipitation water tank, then three-level settling tank is flowed by filter screen 13, then flow into filtered water tank 11 by filter screen 13.Hydrogen-oxygen Change sodium solution to be launched according to the pH value size detected in sewage, guarantees that the pH in sewage is not less than 9.Settling tank 12 and clear The precipitating of the bottom of water tank 11 is discharged by manual ash-valve 9 except pit 8.The floater intercepted through filter screen 13 can be used Dredger is pulled out, and Dust Capacity is reduced.11 moisturizing of filtered water tank can be given by moisturizing pipeline 14.

The utility model utilizes multi-stage spray device, carries out concentration spray washing into the flue gas before wet scrubber, Then wet scrubber is entered back into, final dusting is equivalent to, improves efficiency of dust collection.Sewage passes through multi stage precipitation water tank precipitating, row Ash, recycling, circulation desulfurization had not only saved a large amount of water resource, but also reduced complicated desulphurization plant, and whole system is greatly Simplify, equipment investment expense and operating cost are substantially reduced, made especially suitable for old boiler housing reform, general old boiler room area It is small, do not place desulfurizing tower, bag filter position.Flocculant is added in overflow launder, makes grey energy rapid condensation discharge, guarantees to follow The cleaning of ring water is conducive to be recycled.

The utility model can effectively mitigate the discharge amount of sulfur dioxide and dust in boiler tail flue gas discharge, process flow Simply, investment operating cost is low, does not especially have condition to install bag filter old boiler room, by before wet scrubber It connects and installs multi-stage spray device in flue additional, can realize desulfurization, dedusting, substantially reduce operating cost, really realize that energy conservation subtracts Row.

Therefore, using the utility model, it can be used for solving old boiler room desulfurization, cleaner transformation, equipment land occupation It is small, quantity of circulating water, pump power are reduced, investment operating cost is low, and it is easy to maintain, do not having condition that bag filter, desulfurization are installed In the case where tower, original wet-scrubbing equipment is utilized, desulfurization, dedusting one are installed on entering the flue before deduster entrance Change equipment, is reused through multi-stage spray centralized processing, multi stage precipitation, Lai Shixian environment protection emission index.The utility model is to old Desulfurization and dedusting transformation in old boiler room has directive significance, plays a decisive role to Air Pollutant Emission Index control.

In conclusion the boiler tail flue gas desulfurization dust-removal system of the utility model can remove boiler tail flue gas desulfurization Dirt, and it is suitable for desulfurization, cleaner transformation of the boiler tail equipped with wet scrubber, ingenious in design, simple for structure, manufacture letter Just, at low cost, it is suitable for large-scale promotion application.

It can be seen that the purpose of this utility model completely and is effectively achieved.The function of the utility model and Structural principle is shown and is illustrated in embodiment, it should be understood by those skilled in the art that institute in foregoing description and attached drawing The embodiments of the present invention shown are only used as illustrating and being not intended to limit the utility model, under without departing substantially from the principle, implement Mode can make any modification.So the utility model includes all changes based on claim spirit and scope of the claims Shape embodiment.

Claims (10)

1. a kind of boiler tail flue gas desulfurization dust-removal system, including connection flue and wet scrubber, the connection flue path Connect the wet scrubber, which is characterized in that the boiler tail flue gas desulfurization dust-removal system further includes sodium hydroxide solution Tank, the first liquid driving device and multiple spray equipments, the sodium hydroxide solution tank pass through first liquid driving device The multiple spray equipments of piping connection, multiple spray equipments are arranged at intervals on institute along the axis direction of the connection flue It states in connection flue.

2. boiler tail flue gas desulfurization dust-removal system according to claim 1, which is characterized in that first liquid driven The number of device is identical as the number of the spray equipment, and first liquid driving device and the spray equipment correspond Piping connection.

3. boiler tail flue gas desulfurization dust-removal system according to claim 1, which is characterized in that the number of the spray equipment Mesh is 2, and 2 spray equipments are respectively I grades of spray equipments and II grades of spray equipments, the I grades of spray equipment and described II grades of spray equipments are arranged at intervals in the connection flue along the axis direction of the connection flue.

4. boiler tail flue gas desulfurization dust-removal system according to claim 1, which is characterized in that the spray equipment uses Spiral nozzle.

5. boiler tail flue gas desulfurization dust-removal system according to claim 1, which is characterized in that the sodium hydroxide solution Tank is sodium hydroxide agitator tank.

6. boiler tail flue gas desulfurization dust-removal system according to claim 1, which is characterized in that the boiler tail flue gas Desulfurization dust-removal system further includes flocculant solution tank, the overflow of wet scrubber described in the flocculant solution tank piping connection Slot.

7. boiler tail flue gas desulfurization dust-removal system according to claim 6, which is characterized in that the flocculant solution tank It is flocculant agitator tank.

8. boiler tail flue gas desulfurization dust-removal system according to claim 1, which is characterized in that the boiler tail flue gas Desulfurization dust-removal system further includes second liquid driving device, filtered water tank and multiple settling tanks, multiple settling tank series connection Connection, the overflow launder of the wet scrubber pass through filtered water tank described in multiple settling tank piping connections, the hydroxide Sodium solution tank is by filtered water tank described in the second liquid driving device piping connection, first described in the filtered water tank piping connection Liquid driving device.

9. boiler tail flue gas desulfurization dust-removal system according to claim 8, which is characterized in that the number of the settling tank Mesh is 3, and 3 settling tanks are respectively level-one settling tank, two-stage precipitation water tank and three-level settling tank, the overflow Level-one settling tank described in slot piping connection, the level-one settling tank pass through three described in the two-stage precipitation water tank piping connection Grade settling tank, filtered water tank described in the three-level settling tank piping connection.

10. boiler tail flue gas desulfurization dust-removal system according to claim 8, which is characterized in that the boiler tail cigarette Desulfurization dust pelletizing system further includes moisturizing pipeline, filtered water tank described in the moisturizing pipeline piping connection.