CN108479323A - A kind of deacidifying device for garbage-incineration smoke purifying - Google Patents

Abstract

The present invention provides a deacidification device for purifying waste incineration flue gas, comprising: a flue gas charger configured to charge the flue gas entering the flue gas charger to form charged flue gas; a reactant charger, configured to charge a reactant entering the reactant charger to form a charged reactant, the charged reactant having a charge opposite to that of the charged smoke; a mixer, the mixer being respectively connected to The flue gas charger and the reactant charger are connected and configured to combine the charged flue gas with the charged reactant; the dust remover is connected to the mixer and configured To remove particulate matter in the flue gas. According to the deacidification device for waste incineration flue gas purification provided by the present invention, by setting the flue gas charger and the reactant charger so that the flue gas and the reactant are charged with opposite charges, and then combined in the mixer, The efficiency of the deacidification reaction is improved, and the operating cost is saved.

Description

A deacidification device for waste incineration flue gas purification

technical field

The invention relates to the field of incineration power generation, in particular to a deacidification device for purifying waste incineration flue gas.

Background technique

In the field of waste incineration flue gas purification technology, the control of acid gas emissions is an important flue gas purification project. At present, waste incineration power plants often arrange dry deacidification equipment after semi-dry deacidification equipment, and use both at the same time to control acid gas emissions. The dry deacidification mostly adopts the pipeline injection method, that is, the slaked lime powder is directly sent into the flue between the semi-dry deacidification reaction tower and the bag filter through pneumatic conveying. In the bag filter, the slaked lime and acid gas react to produce It turns into fly ash and is collected by the bag filter to achieve the purpose of deacidification. In addition, a similar method is used to remove heavy metals and dioxins. The activated carbon powder is sent into the flue between the semi-dry deacidification reaction tower and the bag filter by pneumatic conveying. After the activated carbon absorbs heavy metals and dioxins Trapped by the dust collector.

However, due to the low deacidification efficiency and high operating cost of the dry deacidification equipment, it is often in a state of outage. The practice of many waste incineration power plants is to increase the input of materials on the semi-dry deacidification equipment, and shut down the dry deacidification equipment. Deacidification equipment, although this can also control the emission of acid gas up to the standard, it will also bring many problems to the semi-dry deacidification equipment, such as poor atomization effect of the atomizer, frequent replacement of the atomizer, and the outlet temperature of the reaction tower. Too low etc.

Therefore, it is necessary to propose a new deacidification device for waste incineration flue gas purification to solve the above problems.

Contents of the invention

A series of concepts in simplified form are introduced in the Summary of the Invention, which will be further detailed in the Detailed Description. The summary of the invention in the present invention does not mean to limit the key features and essential technical features of the claimed technical solution, nor does it mean to try to determine the protection scope of the claimed technical solution.

The invention provides a deacidification device for purifying waste incineration flue gas, comprising:

A gas charger configured to charge the gas entering the gas charger to form charged gas;

a reactant charger configured to charge a reactant entering the reactant charger to form a charged reactant having a charge opposite to that of the charged smoke;

a mixer, the mixer is respectively connected to the gas charger and the reactant charger, and is configured to combine the charged smoke with the charged reactant;

a dust remover, the dust remover is connected to the mixer and is configured to remove particulate matter in the flue gas.

Further, the deacidification device also includes:

The semi-dry deacidification reaction tower is configured to deacidify flue gas, and the flue gas treated by the semi-dry deacidification reaction tower is discharged into the flue gas charger.

Further, the reactant includes lime powder.

Further, the gas charger and the reactant charger include a deflector, a corona wire and a grounding plate.

Further, the corona wires are arranged perpendicular to the flow direction of the flue gas or the reactant, and connected to a high-voltage DC power supply after being combined, and the grounding plates are arranged on both sides of the corona wires.

Further, the corona wire includes prickly wire or herringbone wire.

Further, the high-voltage DC power supply provides a high-frequency power supply with a DC high-voltage output of 8KV-10KV.

Further, the ground plate forms a plurality of discharge channels.

Further, the material of the ground plate includes conductive glass fiber reinforced plastic.

Further, the charged smoke is positively charged, and the charged reactant is negatively charged.

According to the deacidification device for waste incineration flue gas purification provided by the present invention, by setting the flue gas charger and the reactant charger so that the flue gas and the reactant are charged with opposite charges, and then combined in the mixer, The efficiency of the deacidification reaction is improved, and the operating cost is saved.

Description of drawings

The following drawings of the invention are hereby included as part of the invention for understanding the invention. Embodiments of the present invention and their descriptions are shown in the drawings to explain the device and principle of the present invention. In the attached picture,

Fig. 1 is a kind of schematic diagram of the deacidification device that is used for waste incineration flue gas purification of the present invention;

Fig. 2 is the schematic diagram of the flue gas charger of the present invention;

Fig. 3 is the schematic diagram of reactant charger of the present invention;

Fig. 4 is a schematic diagram of reactant pipeline layout of the present invention;

Fig. 5 is a schematic diagram of the arrangement of reactant pipelines in the present invention.

Reference sign

1. Semi-dry deacidification reaction tower 2. Flue gas charger 3. Reactant charger

4. Mixer 5. Reactant pipeline 6. Dust collector

7. Smoke deflector 8. Positive corona wire 9. Grounding plate

10. Reactant air deflector 11. Negative electrode corona wire

Detailed ways

In the following description, numerous specific details are given in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without one or more of these details. In other examples, some technical features known in the art are not described in order to avoid confusion with the present invention.

In order to thoroughly understand the present invention, detailed steps will be provided in the following description to illustrate a deacidification device for waste incineration flue gas purification proposed by the present invention. It is evident that the practice of the invention is not limited to specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments besides these detailed descriptions.

It should be understood that when the terms "comprising" and/or "comprising" are used in this specification, they indicate the presence of the features, integers, steps, operations, elements and/or components, but do not exclude the presence or addition of one or Multiple other features, integers, steps, operations, elements, components and/or combinations thereof.

The present invention provides a deacidification device for purifying waste incineration flue gas. As shown in FIG.

The deacidification device used for purification of waste incineration flue gas provided by the present invention also includes a semi-dry deacidification reaction tower 1 . Exemplarily, the semi-dry deacidification reaction tower 1 is provided with an atomizer, and the slaked lime slurry is sprayed into the semi-dry deacidification reaction tower 1 and acid gases (such as SO _x , HCl etc.) to react to achieve the purpose of deacidification.

The flue gas discharged from the semi-dry deacidification reaction tower 1 enters the flue gas charger 2, and the flue gas charger 2 is configured to charge the flue gas entering the flue gas charger to form charged flue gas.

Referring to FIG. 2 , the gas charger 2 includes a gas deflector 7 , a positive corona wire 8 and a ground plate 9 . Further, the positive corona wire 8 is arranged perpendicular to the flow direction of the flue gas, and after being combined, it is connected to a positive high-voltage DC power supply. The positive high-voltage DC power supply can provide a DC high-voltage output of 8KV-10KV. The voltage and current are adjustable, and the real-time value can be passed through The power supply comes with a digital panel display. Further, the ground plate 9 is arranged on both sides of the positive corona wire 8 to form a discharge channel. At least two grounding plates 9 are arranged in the gas charger 2 to form at least one discharge channel, and a plurality of grounding plates 9 may also be arranged in the gas charger 2 to form multiple discharge channels. The flue gas discharged from the semi-dry deacidification reaction tower 1 is evenly dispersed in the flue gas charger 2 through the flue gas deflector 7, and is positively charged in the discharge channel.

The deacidification device for waste incineration flue gas purification provided by the present invention also includes a reactant charger 3 configured to charge the reactant entering the reactant charger 3 to form a charged reactant, the charged reactant The charge of the reactant is opposite to that of the charged smoke.

Referring to FIG. 3 , the reactant charger 3 includes a reactant air flow deflector 10 , a negative corona wire 11 and a grounding plate 9 . Further, the negative corona wire 11 is arranged perpendicular to the flow direction of the reactant gas flow, and connected to a negative high-voltage DC power supply after being combined. The negative high-voltage DC power supply can provide a DC high-voltage output of 8KV-10KV, the voltage and current are adjustable, and the real-time value can be adjusted. Through the power supply comes with a digital panel display. Further, the ground plate 9 is arranged on both sides of the negative corona wire 11 to form a discharge channel. The reactant charger 3 is provided with at least two grounded plates 9 to form at least one discharge channel, and the reactant charger 3 may also be provided with multiple grounded plates 9 to form multiple discharge channels. The reactant includes lime powder. The fine lime powder is uniformly dispersed in the reactant charger 3 through the reactant airflow deflector 10, and is charged with a negative charge in the discharge channel.

Exemplarily, the positive corona wire 8 and the negative corona wire 11 include prickly wire or herringbone wire; the material of the ground plate 9 includes conductive glass fiber reinforced plastic.

The deacidification device for waste incineration flue gas purification provided by the present invention also includes a mixer 4, which is connected to the flue gas charger 2 and the reactant charger 3 respectively, and is configured to make the The charged smoke is combined with the charged reactant.

In one embodiment, the charged flue gas discharged from the gas charger 2 enters the mixer 4, the charged reactant discharged from the reactant charger 3 enters the mixer 4 through the reactant pipeline 5, and the positively charged The electric smoke and the negatively charged reactants are fully mixed in the mixer, and the two attract and combine with each other under the action of Coulomb force. Compared with the case where the flue gas and the reactants are not charged, the lime powder particles can combine with more acid gas molecules, which improves the reaction efficiency.

Further, there are various arrangements of the reactant pipeline 5 . It can be multi-path reactant, three kinds shown in Fig. 4, also can be more path-feed reactant, and this depends on factors such as reactant dose and tube diameter. There can also be multiple directions for entering the reactants. Figure 5 lists two arrangements, each arrangement has a different mixing effect, and the optimal method can be selected according to the actual situation.

The deacidification device for purification of waste incineration flue gas provided by the present invention further includes a dust collector 6 connected to the mixer 4 and configured to remove particulate matter in the flue gas. Further, the flue gas discharged from the mixer 4 enters the dust collector 6 after being mixed with activated carbon in the pipeline between the mixer 4 and the dust collector 6. As an example, the dust collector 6 includes a bag filter, and the bag removes the dust in the flue gas. Particles such as dust, deacidification products, and activated carbon adsorbed with harmful substances are collected and sent to a fly ash storage bin (not shown).

In one embodiment, the deacidification device used for waste incineration flue gas purification provided by the present invention also includes a second reactant charger, so that the activated carbon is charged with a charge opposite to that of the charged flue gas, and the concentration of heavy metals and secondary The adsorption efficiency of oxins.

The working process of the deacidification device used for waste incineration flue gas purification provided by the present invention is as follows: the flue gas first passes through the semi-dry deacidification reaction tower 1 to deacidify and then enters the flue gas charger 2, and the flue gas is charged in the flue gas charger 2 The positive charge forms the charged smoke, and then enters the mixer 4; the reactant enters the reactant charger 3 and is charged with a negative charge to form a charged reactant, and then also enters the mixer 4 through the reactant pipeline 5; The flue gas and charged reactants are attracted and combined in the mixer 4, and then enter the dust collector 6 to remove particulate matter in the flue gas.

According to the deacidification device for waste incineration flue gas purification provided by the present invention, by setting the flue gas charger and the reactant charger so that the flue gas and the reactant are charged with opposite charges, and then combined in the mixer, The efficiency of the deacidification reaction is improved, and the operating cost is saved.

The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of illustration and description, and are not intended to limit the present invention to the scope of the described embodiments. In addition, those skilled in the art can understand that the present invention is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the claimed scope of the present invention. within the range. The protection scope of the present invention is defined by the appended claims and their equivalent scope.

Claims (10)

1. a kind of deacidifying device for garbage-incineration smoke purifying, which is characterized in that including：

Flue gas charge electric appliance is configured to that the flue gas into the flue gas charge electric appliance is made to charge to form charged flue gas；

Reactant charge electric appliance is configured to make to enter the reactant in the reactant charge electric appliance and charges to form charged reactant, The opposite charge of the charge of the charged reactant and the charged flue gas；

Mixer, the mixer are connected with the flue gas charge electric appliance and the reactant charge electric appliance, are configured to make respectively The charged flue gas is combined with the charged reactant；

Deduster, the deduster are connected with the mixer, are configured to remove the particulate matter in the flue gas.

2. deacidifying device as described in claim 1, which is characterized in that further include：

Semidry method depickling reaction tower is configured to carry out depickling to flue gas, by the semidry method depickling reaction tower treated cigarette Gas drains into the flue gas charge electric appliance.

3. deacidifying device as described in claim 1, which is characterized in that the reactant includes pulverized limestone.

4. deacidifying device as described in claim 1, which is characterized in that the flue gas charge electric appliance and the reactant charge electric appliance packet Include deflector, corona wire and ground connection pole plate.

5. deacidifying device as claimed in claim 4, which is characterized in that the corona wire is perpendicular to flue gas or reactant flow side To arrangement, high-voltage DC power supply is accessed after merging, the ground connection pole plate is set to the both sides of the corona wire.

6. deacidifying device as claimed in claim 4, which is characterized in that the corona wire includes prickle wire or fish-bone line.

7. deacidifying device as claimed in claim 5, which is characterized in that it is high that the high-voltage DC power supply provides 8KV-10KV direct currents Press the high frequency electric source of output.

8. deacidifying device as claimed in claim 4, which is characterized in that the ground connection pole plate forms multiple discharge channels.

9. deacidifying device as claimed in claim 8, which is characterized in that the material of the ground connection pole plate includes electroconductive frp.

10. deacidifying device as described in claim 1, which is characterized in that the charged flue gas is positively charged, the charged reaction Agent is negatively charged.