CN211801635U

CN211801635U - Device for eliminating colored smoke plume by utilizing electrostatic drive of space charge injection

Info

Publication number: CN211801635U
Application number: CN201922338511.5U
Authority: CN
Inventors: 董胜明; 田绅; 胡晓微; 黄俊芳
Original assignee: Tianjin University of Commerce
Current assignee: Tianjin University of Commerce
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-10-30
Anticipated expiration: 2029-12-24

Abstract

The utility model relates to the technical field of environmental protection devices, in particular to a device for eliminating colored smoke plume by utilizing the static drive of space charge injection, which comprises a fog generating chamber, a water drop catching chamber, a variable frequency fan, a turbulent flow fan, a water drop collecting net, an ion emitter and a water collecting pump; the fog generating chamber is communicated with the water drop catching chamber, a smoke inlet and an ambient air inlet are formed in the fog generating chamber, the variable frequency fan is installed in the ambient air inlet, and fan blades of the turbulent fan are located in the fog generating chamber; a plurality of stages of water drop collecting nets and ion emitters are arranged in the water drop catching chamber; the water collecting pump is respectively connected with the bottom of the mist generation chamber and the bottom of the water drop catching chamber through pipelines. The device realizes the treatment of the colored smoke plume under the lower initial investment and operation cost. The utility model relates to a system does not have huge heat exchanger or heater, reduction cost that can be very big.

Description

Device for eliminating colored smoke plume by utilizing electrostatic drive of space charge injection

Technical Field

The utility model relates to an environment-friendly device technical field especially relates to an utilize electrostatic drive of space charge injection to eliminate colored plume device.

Background

At present, most of domestic flue gas in the steel, coking and chemical industries is subjected to spray or wet desulphurization before being discharged, the temperature is reduced to 45-80 ℃, the flue gas is usually saturated wet flue gas at the moment, the flue gas contains a large amount of water vapor, and the water vapor contains more soluble salts, SO3, gel dust, micro dust and the like (which are main components of haze). If the flue gas is directly discharged from the chimney and enters the ambient air with lower temperature, the state point is in the fog region when the flue gas is mixed with the saturated flue gas because the ambient air has lower temperature, and at the moment, water vapor in the flue gas is cooled to form small liquid drops which coexist with the flue gas, namely, wet smoke plume is formed. As mentioned above, the smoke plume contains a lot of harmful substances, and the phenomenon that the haze of China is becoming more serious in recent years is also attributed to colored smoke plume by professional scholars. Therefore, the extraction or collection of the liquid water drops therein is an effective effort to eliminate or treat the colored smoke plume.

In the treatment process of the colored smoke plume, a mode of firstly condensing and then heating is generally adopted, the process flow is that firstly, smoke is cooled to below a saturation temperature through a heat exchanger, water vapor in the smoke is condensed, the condensed smoke is saturated smoke, but the moisture content of the smoke is reduced, then the smoke is heated through a second-stage heat exchanger, the moisture content of the smoke is unchanged, but the relative humidity of the smoke is reduced, the smoke is changed into unsaturated smoke, the unsaturated smoke is discharged into the atmosphere, and after the smoke is contacted with air, the state of a mixing point is present outside a 'fog area/supersaturation area', so that the formation of the colored smoke plume can be effectively avoided or alleviated. The flue gas treatment process can realize water-gas separation, but the energy consumption and initial investment are large, and for example, in the flue gas cooling and heating links, a large amount of high-grade energy is consumed. For example, a heat pump is utilized, and the whole process needs at least two heat exchangers and other auxiliary equipment, and the heat exchangers have strong corrosion resistance and are very high in manufacturing cost. The other treatment mode is to directly heat saturated flue gas to improve the relative humidity of the flue gas, so that the mixing point is outside the fog area/supersaturation area when the flue gas is mixed with the outside air.

As mentioned above, the flue gas temperature participating in colored smoke plume elimination is low, is often below the acid dew point temperature, has strong corrosivity, and puts high requirements on the participating heat exchangers no matter the flue gas is heated or cooled. For the metal heat exchanger, the heat exchange coefficient is higher than that of the fluoroplastic heat exchanger, but the heat exchange coefficient is limited by the low heat conductivity coefficient of the flue gas, and the cost of the heat exchanger is higher. Taking Tianjin City Jinshi group heating plant as an example, the heating plant has 4 gas boilers in total, and when the gas boiler runs at full load, the flue gas flow is 20000m³The temperature is 100 ℃, the heating plant is built in a residential area, and a large amount of colored smoke plume can be formed at the tail end of a flue when the heating season is lost, so that great trouble is brought to surrounding residents. The adopted colored smoke plume elimination process of firstly cooling and then heating has the advantages that the required heat exchange area is 700 square meters by calculation, the material quality is 304 stainless steel, and the cost of the heat exchanger is nearly 30 ten thousand yuan. Therefore, the cost of the existing colored smoke plume elimination equipment also becomes a bottleneck limiting the wide-range popularization of the equipment.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to overcome the above-mentioned deficiencies, and to provide a device for eliminating colored smoke plume by electrostatic driving with space charge injection.

The utility model discloses a realize above-mentioned purpose, adopt following technical scheme: a device for eliminating colored smoke plume by utilizing electrostatic drive of space charge injection is characterized in that: the device comprises a fog generating chamber, a water drop catching chamber, a variable frequency fan, a turbulent flow fan, a water drop collecting net, an ion emitter and a water collecting pump; the fog generating chamber is communicated with the water drop catching chamber, a smoke inlet and an ambient air inlet are formed in the fog generating chamber, the variable frequency fan is installed in the ambient air inlet, fan blades of the turbulent fan are located in the fog generating chamber and used for enhancing mixing of smoke and ambient air, and under the action of the turbulent fan, the smoke and the ambient air are fully mixed and colored smoke plumes appear; a plurality of stages of water drop collecting nets and ion emitters are arranged in the water drop catching chamber; the water collecting pump is respectively connected with the bottom of the mist generation chamber and the bottom of the water drop catching chamber through pipelines.

Preferably, the water drop collecting net and the ion emitter are made of stainless steel.

Preferably, the surface of the water droplet collecting net is coated with a hydrophobic coating to accelerate the removal of the collected water droplets.

Preferably, the ion emitter is connected with the negative electrode of the direct current power supply, the positive electrode of the direct current power supply is grounded, and the water drop collecting net is grounded.

Preferably, the voltage of the ion emitter is adjustable.

Compared with the prior art, the device realizes the treatment of the colored smoke plume under the condition of lower initial investment and operation cost. The utility model relates to a system does not have huge heat exchanger or heater, reduction cost that can be very big. In the testing process of the prototype, the power consumption of the direct current power supply is very small.

Drawings

FIG. 1 is a corresponding device structure diagram of the present invention

Fig. 2 is a working principle diagram of the water drop catching chamber of the utility model.

In the figure: 1-a mist generating chamber; 2-a droplet catching chamber; 3-a flue gas inlet; 4-ambient air inlet; 5-mixed gas outlet; 6-a variable frequency fan; 7-a turbulent fan; 8-a water droplet collection net; 9-an ion emitter; 10-a ground terminal; 11-a direct current power supply; 12-a temperature and humidity sensor; 13-a flow meter; 14-collecting water pump; 15-charged droplets; a-flue gas; b-ambient air; c-treating the flue gas air mixture; d-water-gas mixture.

Detailed Description

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1-2, the device for eliminating colored smoke plume by electrostatic drive of space charge injection comprises a fog generating chamber 1, a water drop catching chamber 2, a variable frequency fan 6, a turbulent fan 7, a water drop collecting net 8, an ion emitter 9, a direct current power supply 11, a heat humidity sensor 12, a flowmeter 13 and a water collecting pump 14. The fog generating chamber is communicated with the water drop catching chamber, a flue gas inlet and an ambient air inlet are formed in the fog generating chamber, the frequency conversion fan is installed in the ambient air inlet, and the frequency conversion fan 6 is used for adjusting the flow of ambient air entering the fog generating chamber according to the flow and the state of the flue gas.

The fan blades of the turbulent fan are positioned in the fog generating chamber and are used for enhancing the mixing of the smoke and the outside air, and the smoke and the outside air are fully mixed and have colored smoke plumes under the action of the turbulent fan; the water drop collecting net and the ion emitter are arranged in multiple stages in the water drop catching chamber, and are not limited to the two stages in fig. 1.

The water collecting pump is respectively connected with the bottom of the mist generation chamber and the bottom of the water drop catching chamber through pipelines. Colored smoke plume generated by the fog generating chamber enters the water drop catching chamber 2, water drops in the mixed gas are injected with net charges by the ion emitter 9 in the water drop catching chamber 2, the water drops 15 with the charges move to the water drop collecting net 8 grounded 10 under the action of an electric field and are caught, and the water drops fall off under the action of gravity after growing to a certain size. The liquid water captured by the water droplet collecting net 8 is drained by the collected water pump 14.

The ion emitter 9 is connected with the negative pole of the direct current power supply 11, and the positive pole of the direct current power supply 11 is grounded. The water droplet collecting net 8 is well grounded. The voltage of the ion emitter 9 is adjustable in order to adjust the voltage correspondingly according to the amount of colored smoke plume.

The utility model discloses a work flow does: the flue gas a enters the fog generating chamber 1 at the flue gas inlet 3, and the ambient air b enters the fog generating chamber 1 from the ambient air inlet 4.

The flow of the ambient air b is controlled by the variable frequency fan 6, and the control idea is as follows: and adjusting the flow of the ambient air b in real time according to the parameters of the flue gas a measured by the flowmeter 13 and the hygrothermograph 12.

The flue gas a and the ambient air b are mixed in the fog generating chamber 1, and the state point is ensured to be in the oversaturation area of the mixed gas, so that a 'tiny water drop-gas' mixture d, namely colored smoke plume is generated. In order to enhance the mixing of the flue gas a and the ambient air b, a turbulent fan 7 is used for stirring, and then the colored smoke plume enters the water drop catching chamber 2.

In the water drop catching chamber 2, water drops in the mixed gas are injected with net charges by the ion emitter 9, under the action of an electric field, the charged water drops 15 move to the water drop collecting net 8 grounded 10 and are caught, and when the water drops grow to a certain size, the water drops fall off under the action of gravity, and the principle diagram is shown in figure 2.

The ion emitter 9 is connected with the negative pole of the direct current power supply 11, and the positive pole of the direct current power supply 11 is grounded. The dehydrated mixed gas c is discharged to the atmosphere through the outlet 5. It should be noted that, depending on the amount of flue gas, the moisture content of flue gas, and the ambient air temperature, the water droplet catching chamber 2 may be provided with a plurality of stages of water droplet collecting nets 8 and ion emitters 9, which are not limited to the two stages in fig. 1.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A device for eliminating colored smoke plume by utilizing electrostatic drive of space charge injection is characterized in that: the device comprises a fog generating chamber, a water drop catching chamber, a variable frequency fan, a turbulent flow fan, a water drop collecting net, an ion emitter and a water collecting pump; the fog generating chamber is communicated with the water drop catching chamber, a smoke inlet and an ambient air inlet are formed in the fog generating chamber, the variable frequency fan is installed in the ambient air inlet, fan blades of the turbulent fan are located in the fog generating chamber and used for enhancing mixing of smoke and ambient air, and under the action of the turbulent fan, the smoke and the ambient air are fully mixed and colored smoke plumes appear; a plurality of stages of water drop collecting nets and ion emitters are arranged in the water drop catching chamber; the water collecting pump is respectively connected with the bottom of the mist generation chamber and the bottom of the water drop catching chamber through pipelines.

2. The electrostatic driving colored plume elimination device using space charge injection as claimed in claim 1, wherein a multi-stage ion emitter and water droplet collection net combination is provided.

3. The electrostatic driving colored plume elimination device using space charge injection as claimed in claim 1, wherein: the surface of the water drop collecting net is coated with a hydrophobic coating, so that the drainage of the collected water drops is accelerated.

4. The electrostatic driving colored plume elimination device using space charge injection as claimed in claim 1, wherein: the ion emitter is connected with the negative electrode of the direct current power supply, the positive electrode of the direct current power supply is grounded, and the water drop collecting net is grounded.

5. The electrostatic driven colored plume elimination apparatus using space charge injection as claimed in claim 1, wherein the ion emitter voltage is adjustable.