CN206935106U - A kind of SO in removing flue gas2Desulfurizer - Google Patents

Abstract

The utility model provides a kind of SO removed in flue gas₂Desulfurizer, desulfurizer includes mixture generator and injector, the SO in flue gas₂Mixed and reacted in mixture generator with desulfurizing agent, injector is arranged on mixture generator, and the first injector and the second injector including being used in conjunction with each other, first injector sprays into low-pressure steam and desulfurizing agent into mixture generator, and the second injector sprays into hot blast into mixture generator.The utility model inserts two bar spray guns by the both sides symmetrical inclined in the Venturi tube based on venturi principle, wherein, first bar spray gun sprays into hot blast into Venturi tube, second bar spray gun sprays into calcium hydroxide and low-pressure steam into Venturi tube, hot blast plays guide functions to desulfurizing agent, is advantageous to the reaction of SO2 and calcium hydroxide.

Description

A kind of SO in removing flue gas2Desulfurizer

Technical field

Fume treatment field is the utility model is related to, in particular to the SO removed in flue gas₂Desulfurizer, application In the fume treatment of biomass direct-fired power plant.

Background technology

Biomass energy refers to that green plants converts solar energy into chemical energy to be stored in inside biomass by chlorophyll Energy, its main source is：Agriculture and forestry organic waste material, industrial wastewater and waste residue, domestic waste and human and animal excreta etc..Mesh Before, the evaluation and exploration technology of biomass mainly includes solidification, gasification, the liquefaction of biomass, and biomass is directly burnt.But Biomass direct-fired process, which contains substantial amounts of pollutant (such as nitrogen oxides, flue dust, sulfide, metal), different journeys to environment The harm of degree.Especially sulfur dioxide, there is very strong toxic action to human body respiration organ, if running into vapor forms sulfuric acid Mist, it is possible to which prolonged stay is in an atmosphere, extremely serious to environmental hazard.Therefore, realizing the efficient removal of sulfur dioxide has Important meaning.

Existing biomass flue gas cleaning system main flow uses in-furnace calcium spraying+circulating fluidized bed dry desulfurization technology, pollutant Removal effect is limited.The desulfuration efficiency of certain areas only has 30%~50%, with boiler export SO₂Concentration is 200mg/Nm³Meter, The SO of sack cleaner outlet₂Concentration is 100~140mg/Nm³, do not reach SO much₂Less than 50mg/Nm³Discharge standard.

In addition, the dry desulfurization device in burning power plant flue gas is directly inserted into level to carry the spray gun of calcium hydroxide In flue, the carbon dioxide mix in the device medium-slaking lime and flue gas is insufficient, causes absorption and reaction efficiency not high.With In biomass direct-fired power plant, because the concentration of biomass electric power plant sulfur dioxide is relatively low, cause reaction efficiency lower.

The main flow sulfur removal technology of current domestic biomass processes is circulating fluidized bed dry+bag-type dust, and the system can expire Sufficient national standard emission request.But because environmental requirement is increasingly strict, certain areas only below national standard also far from It is enough, it is desirable to reach SO₂＜ 50mg/Nm³。

It is, therefore, desirable to provide a kind of new desulfurizer for removing the SO2 in flue gas, to solve above-mentioned ask at least in part Topic.

Utility model content

In view of the shortcomings of the prior art, the utility model provides a kind of SO removed in flue gas₂Desulfurizer, it is described de- Sulphur device includes：

Mixture generator, the SO in flue gas₂Mixed and reacted in the mixture generator with desulfurizing agent；

Injector, the injector are arranged on the mixture generator, and the including being used in conjunction with each other first injection Device and the second injector, the first injector spray into low-pressure steam and desulfurizing agent into the mixture generator, the second injector to Hot blast is sprayed into the mixture generator.

Preferably, first injector and second injector are arranged symmetrically in the both sides of the mixture generator.

Preferably, first injector and the second injector oblique cutting enter in the mixture generator.

Preferably, first injector and second injector are spray gun.

Low-pressure steam injection sleeve pipe, the low pressure are internally provided with preferably as the spray gun of first injector Steam is injected into the mixture generator by the low-pressure steam injection sleeve pipe.

Preferably, the mixture generator is Venturi tube.

Preferably, the desulfurizing agent is calcium hydroxide.

The utility model provides the dry desulfurization that can realize a sulfur dioxide minimum discharge processing unit, by The both sides symmetrical inclined of Venturi tube based on venturi principle inserts two bar spray guns, wherein, the first bar spray gun is into Venturi tube Hot blast is sprayed into, the second bar spray gun sprays into calcium hydroxide and low-pressure steam into Venturi tube, and the first bar spray gun is as air baffle Structure, after hot blast is by the first bar spray gun, water conservancy diversion wind is sprayed into the position on the opposite of the second bar spray gun, this water conservancy diversion wind energy is by leading Stream acts on, to promote the mixing and absorption of flue gas and lime to react.Meanwhile the penetrating of low-pressure steam, it can moisten as desulfurizing agent Calcium hydroxide, it can further promote the atomizing effect of calcium hydroxide and promote to form one layer of thin liquid film in niter gray surface, be advantageous to SO2 With the reaction of calcium hydroxide, so as to improve the desulfuration efficiency of calcium hydroxide.

Brief description of the drawings

Drawings below of the present utility model is used to understand the utility model in this as a part of the present utility model.Accompanying drawing In show embodiment of the present utility model and its description, for explaining principle of the present utility model.

In accompanying drawing：

Fig. 1 is the structural representation of desulfurizer provided by the utility model.

Embodiment

In the following description, a large amount of concrete details are given more thoroughly to manage the utility model to provide Solution.It is, however, obvious to a person skilled in the art that the utility model can be without one or more of these thin Save and be carried out.In other examples, in order to avoid obscuring with the utility model, for more well known in the art Technical characteristic is not described.

In order to thoroughly understand the utility model, detailed method and step and/or structure will be proposed in following description.It is aobvious So, execution of the present utility model is not limited to specific details appreciated by those skilled in the art.It is of the present utility model compared with Good embodiment is described in detail as follows, but in addition to these detailed descriptions, the utility model can also have other embodiment.

It should be appreciated that the utility model can be implemented in different forms, and should not be construed as being limited to carry here The embodiment gone out.On the contrary, providing these embodiments disclosure will be made thoroughly and complete and the scope of the utility model is complete Ground passes to those skilled in the art.In the accompanying drawings, for clarity, the size and relative size in Ceng He areas may be exaggerated. Same reference numerals represent identical element from beginning to end.

It should be appreciated that when using term "comprising" and/or " comprising " in this manual, it is indicated described in presence Feature, entirety, step, operation, element and/or component, but do not preclude the presence or addition of other one or more features, entirety, Step, operation, element, component and/or combinations thereof." one " of singulative, "one" and " described/should " be also intended to include Plural form, unless context is expressly noted that other mode.

As shown in figure 1, the SO of the present utility model removed in flue gas₂Desulfurizer 1 include mixture generator 100 and spray Emitter 200.SO in flue gas₂Mixed and reacted in mixture generator 100 with desulfurizing agent.Injector 200 configures To spray into low-pressure steam, desulfurizing agent and hot blast into the mixture generator 100.Mixture generator 100 is based on venturi principle. In the present embodiment, mixture generator 100 is Venturi tube.

Injector 200 includes the first injector 210 and the second injector 220, and the first injector 210 is to mixture generator Low-pressure steam is sprayed into 100 and desulfurizing agent, the second injector 220 spray into hot blast into mixture generator 100.In the present embodiment In, desulfurizing agent is calcium hydroxide.

Preferably, the first injector 210 and the second injector 220 are arranged symmetrically in the both sides of mixture generator 100.Enter one Preferably, the first injector 210 and the oblique cutting of the second injector 220 enter in mixture generator 100 step.

In the present embodiment, the first injector 210 and the second injector 220 are spray gun.Spray as the first injector 210 Rifle is internally provided with low-pressure steam injection sleeve pipe 211, and low-pressure steam is injected into mixing by low-pressure steam injection sleeve pipe 211 In device 100.The atomizing effect of calcium hydroxide can further be promoted and promote one layer thin in the formation of niter gray surface by being passed through low-pressure steam Liquid film, be advantageous to SO₂With the reaction of calcium hydroxide.

Second injector 220 is used as air conducting harden structure, passes through the second spray to be injected into the hot blast in mixture generator 100 Water conservancy diversion wind is formed after emitter 220 in mixture generator 100, after hot blast is by spray gun, in the position on the opposite of the first injector 210 Water conservancy diversion wind is sprayed into, this water conservancy diversion wind energy is by guide functions, to promote the mixing and absorption of flue gas and lime to react.SO₂And calcium hydroxide Between gas-solid reaction not by rate limitation, can be by strengthening SO in adsorbent₂Diffusion improve calcium hydroxide to SO₂'s Absorption efficiency, the design using spray gun as air conducting harden structure, the SO being considerably improved in calcium hydroxide₂Diffusion, and then Calcium hydroxide is improved to SO₂Absorption efficiency.

The advantages of the utility model：

By this technique, biomass direct-fired power plant SO is realized₂Less than 50mg/Nm³Minimum discharge requirement, reaches the thorough of flue gas Bottom purifies.

The utility model provides the dry desulfurization that can realize a sulfur dioxide minimum discharge processing unit, by The both sides symmetrical inclined of Venturi tube based on venturi principle inserts two bar spray guns, wherein, the first bar spray gun is into Venturi tube Hot blast is sprayed into, the second bar spray gun sprays into calcium hydroxide and low-pressure steam into Venturi tube, and the first bar spray gun is as air baffle Structure, after hot blast is by the first bar spray gun, water conservancy diversion wind is sprayed into the position on the opposite of the second bar spray gun, this water conservancy diversion wind energy is by leading Stream acts on, to promote the mixing and absorption of flue gas and lime to react.Meanwhile the penetrating of low-pressure steam, it can moisten as desulfurizing agent Calcium hydroxide, it can further promote the atomizing effect of calcium hydroxide and promote to form one layer of thin liquid film in niter gray surface, be advantageous to SO₂ With the reaction of calcium hydroxide, so as to improve the desulfuration efficiency of calcium hydroxide.

It is new that the similar replacement or deformation of individual part or component in desulfurizer of the present utility model each fall within this practicality Within the protection domain of type.

The utility model is illustrated by above-described embodiment, but it is to be understood that, above-described embodiment is For the purpose illustrated and illustrated, and it is not intended to the utility model being limited in described scope of embodiments.In addition ability Field technique personnel are it is understood that the utility model is not limited to above-described embodiment, according to teaching of the present utility model also More kinds of variants and modifications can be made, these variants and modifications all fall within the utility model scope claimed with It is interior.The scope of protection of the utility model is defined by the appended claims and its equivalent scope.

Claims (7)

1. A kind of 1. SO removed in flue gas₂Desulfurizer, it is characterised in that the desulfurizer includes：

   Mixture generator, the SO in flue gas₂Mixed and reacted in the mixture generator with desulfurizing agent；

   Injector, the injector are arranged on the mixture generator, and the first injector including being used in conjunction with each other and Second injector, the first injector spray into low-pressure steam and desulfurizing agent into the mixture generator, and the second injector is to described Hot blast is sprayed into mixture generator.
2. 2. desulfurizer according to claim 1, it is characterised in that first injector and second injector pair Claim the both sides for being arranged in the mixture generator.
3. 3. desulfurizer according to claim 2, it is characterised in that first injector and second injector are oblique Insert in the mixture generator.
4. 4. desulfurizer according to claim 3, it is characterised in that first injector and second injector are Spray gun.
5. 5. desulfurizer according to claim 4, it is characterised in that the inside as the spray gun of first injector is set Low-pressure steam injection sleeve pipe is equipped with, the low-pressure steam is injected into the mixture generator by the low-pressure steam injection sleeve pipe In.
6. 6. desulfurizer according to claim 1, it is characterised in that the mixture generator is Venturi tube.
7. 7. desulfurizer according to claim 1, it is characterised in that the desulfurizing agent is calcium hydroxide.