Pollutant absorption device for condensable particulate matters in flue gas

Abstract

The utility model discloses a pollutant absorption device for condensable particulate matters in flue gas. The pollutant absorption device comprises a flue gas filtering device, by means of the cooperation of various structural devices in the flue gas filtering device, the absorption liquid can exert the maximum absorption effect in the up-and-down circulating reciprocating motion, the value of the absorption liquid is maximized, flue gas particles are absorbed by adopting multiple absorption devices, and the absorption efficiency of the flue gas particles is improved. And the flue gas detector is used for detecting the flue gas at the discharge pipeline, so that the flue gas is selectively judged.

Description

Technical Field

[0001] The utility model relates to a pollutant absorption device for flue gas condensable particles, which can be widely used in pollutant removal devices for condensable particles in tail flue gas of desulfurization towers and other industrial boilers. Background Art

[0002] Although the emission control level of conventional pollutants such as SO2 and NOx in factory exhaust gas has been greatly improved, there is still a lack of effective control means and methods for condensable particulate matter. In particular, after desulfurization by desulfurization towers and other devices, the flue gas still carries a large amount of condensable particulate matter, which will cause environmental pollution when discharged into the atmosphere.

[0003] In most absorption devices, the initial treatment of flue gas is to spray the absorption liquid directly downward from the top of the device. After the absorption liquid falls to the bottom of the absorption container, some solutions will directly discharge the absorption liquid into the waste liquid reservoir through the waste liquid discharge system, and the other part will use the circulation system to pump the absorption liquid into the spray device again for recycling. The inventor found that the former solution (discharging the absorption liquid) did not bring into play the absorption effect of the absorption liquid itself, resulting in a great waste of resources. Although the second method recycles the absorption liquid, the absorption liquid's own efficacy will gradually weaken during the circulation process, and a good exhaust gas absorption effect cannot be achieved. Utility Model Content

[0004] The utility model provides a pollutant absorption device for flue gas condensable particulate matter, aiming to overcome the existing technical problems raised in the above-mentioned background technology. During use, the absorption liquid can exert its own adsorption function to the maximum extent.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A pollutant absorption device for flue gas condensable particulate matter comprises a flue gas filtering device.

[0007] The smoke filter device is provided with an air inlet and an air inlet pipe on the left side, the air inlet pipe is connected to the air inlet, and an air outlet and a discharge pipe are provided on the right side, the discharge pipe is connected to the air outlet.

[0008] The smoke filtering device includes a preliminary smoke filtering device, which consists of a diversion sprayer, a liquid fan, a height sensor, a hollow baffle body, and a liquid fan driving device. The hollow baffle body includes a left hollow baffle body and a right hollow baffle body. The preliminary smoke filtering device is provided with a left hollow baffle body, two side-by-side rotatable liquid fans and a right hollow baffle body from left to right. The diversion sprayer is located above the liquid fan. Height sensors are installed on the walls of the left and right hollow baffle bodies. A liquid fan driving device is respectively arranged inside the walls of the left and right hollow baffle bodies. The length of the right hollow baffle body can extend all the way to the right air outlet.

[0009] The hollow baffle bodies have a certain height, and the absorption liquid sprayed by the self-dividing sprayer can be accumulated between the hollow baffle bodies. The liquid fan driving device is electrically connected to the liquid fan.

[0010] The smoke filtering device also includes a secondary filtering device, which is located on the right side of the smoke primary filtering device and adjacent to the air outlet. The secondary filtering device consists of a triple filtering layer and a support platform. The upper and lower parts of the support platform are correspondingly arranged, and the lower part is arranged on the upper surface of the right hollow baffle body.

[0011] The smoke filtering device also includes an absorption liquid diversion system, which consists of a diversion pipe, an absorption liquid storage reservoir and a liquid pump. One end of the diversion pipe is connected to the liquid outlet of the absorption liquid storage reservoir, and the other end is connected to the diversion sprayer. The liquid pump is installed on the diversion pipe.

[0012] A plurality of supporting legs are vertically fixedly connected to the bottom of the smoke filter device, a fixing plate is arranged at the lower end of the supporting leg, and a waste liquid collection reservoir is installed on the fixing plate between the first and second supporting legs on the left side.

[0013] A waste liquid outlet is provided at the lower end of the liquid blower, and the waste liquid collection reservoir is directly connected to the waste liquid outlet through a waste liquid collection pipeline. There is a switch valve at the connection port, and the switch valve is controlled by a height sensor.

[0014] The smoke filtering device also includes a smoke reflux mechanism, which includes a smoke reflux pipe, a solenoid valve and a one-way valve. The left end of the smoke reflux pipe is connected to the air intake pipe, and the right end is connected to the exhaust pipe and a solenoid valve is provided at the connection. A one-way valve is provided at the connection between the smoke reflux pipe and the air inlet.

[0015] A smoke detector is arranged on the inner wall of the discharge pipe. The smoke detector is placed in the discharge pipe in an upper and lower position. A control valve is arranged behind the smoke detector. The solenoid valve is located between the control valve and the smoke detector. The smoke detector is electrically connected to the control valve and the solenoid valve.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The liquid diversion system will spray the absorption liquid by conveying it to the diversion sprayer. After the initial adsorption of the flue gas, the absorption liquid will accumulate in the hollow baffle. The liquid fan can make the accumulated absorption liquid circulate reciprocatingly to maximize the remaining efficacy of the absorption liquid. When the absorption liquid height reaches the design height of the height sensor, the switch valve between the waste liquid collection pipe and the waste liquid discharge port is opened, and the absorption liquid flows through the waste liquid collection pipe to the waste liquid collection reservoir.

[0018] 2. The present invention adopts multiple absorption devices to absorb smoke particles, and relies on smoke detectors to detect smoke at the exhaust pipe, so as to make selective judgments on the smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure.

[0020] Figure 1 : Schematic diagram of the structure of the utility model;

[0021] Among them, 1 is an air intake pipe, 2 is a left hollow baffle body, 3 is a height sensor, 4 is a supporting leg, 5 is a waste liquid collection reservoir, 6 is a liquid fan, 7 is a switch valve, 8 is a waste liquid collection pipe, 9 is an adsorbent layer, 10 is an activated carbon layer, 11 is a supporting platform, 12 is an absorption liquid storage reservoir, 13 is a liquid pump, 14 is a guide pipe, 15 is a high-efficiency filter layer, 16 is a smoke detector, 17 is a solenoid valve, 18 is a control valve, 19 is a liquid fan driving device, 20 is a diversion sprayer, 21 is a one-way valve, 22 is a discharge pipe, 23 is a fixed plate, 24 is a right hollow baffle body, 25 is a smoke return pipe, 26 is an air inlet, and 27 is an air outlet. DETAILED DESCRIPTION

[0022] Embodiment 1:

[0023] like Figure 1 As shown, this embodiment provides a pollutant absorption device for flue gas condensable particulate matter, and the absorption device includes a flue gas filtering device.

[0024] An air inlet 26 and an air inlet pipe 1 are provided on the left side of the smoke filter device, and the air inlet pipe is connected to the air inlet. An air outlet 27 and a discharge pipe 22 are provided on the right side, and the discharge pipe is connected to the air outlet.

[0025] The smoke filtering device includes a preliminary smoke filtering device, which consists of a diverter sprayer 20, a liquid fan 6, a height sensor 3, a hollow baffle body, and a fan drive device 19. The hollow baffle body includes a left hollow baffle body and a right hollow baffle body. The preliminary smoke filtering device is provided with a left hollow baffle body 2, two side-by-side rotatable liquid fans and a right hollow baffle body 24 from left to right. The diverter sprayer is located above the liquid fan. Height sensors are installed on the walls of the left and right hollow baffle bodies. A liquid fan drive device is respectively arranged inside the walls of the left and right hollow baffle bodies. The length of the right hollow baffle body can extend all the way to the right air outlet.

[0026] The hollow baffle body has a certain height, and the absorption liquid sprayed by the self-diverting sprayer can accumulate between the hollow baffle bodies. The liquid fan driving device can drive the liquid fan to rotate. During the rotation of the liquid fan, the absorption liquid in the absorption liquid accumulation space will drive the absorption liquid to do up and down reciprocating motion. During the circulation process, the absorption liquid will contact the flue gas above again, giving full play to the absorption effect of the absorption liquid itself.

[0027] The smoke filtering device also includes a secondary filtering device, which is located on the right side of the smoke primary filtering device. The end of the secondary filtering device is connected to the discharge pipe 22 through the air outlet of the absorption device.

[0028] The secondary filtration device consists of a triple filtration layer and a support platform 11. Each set of support platforms is composed of two corresponding parts, the lower part is arranged on the upper surface of the hollow baffle body on the right, and the upper and lower parts are arranged correspondingly. The triple filtration layer is fixed on the support platform 11. From left to right, they are the adsorbent layer 9, the activated carbon layer 10 and the high-efficiency filtration layer 15.

[0029] The smoke filtering device also includes an absorption liquid diversion system, which consists of a diversion pipe 14, an absorption liquid storage reservoir 12 and a liquid pump 13. One end of the diversion pipe is connected to the liquid outlet of the absorption liquid storage reservoir, and the other end is connected to the diversion sprayer. The liquid pump is installed on the diversion pipe. One end of the diversion pipe is connected to the liquid outlet of the absorption liquid storage reservoir, and the other end is connected to the diversion sprayer. With the help of the liquid diversion system, the absorption liquid stored in the absorption liquid storage reservoir can be diverted to the diversion sprayer. The liquid pump provides power for the entire diversion system, and the diversion sprayer can evenly distribute the absorption liquid to the spraying port for spraying.

[0030] The smoke filtering device also includes a smoke reflux mechanism, which includes a smoke reflux pipe 15, a solenoid valve 17 and a one-way valve 21. The left end of the smoke reflux pipe is connected to the air intake pipe 1, and the right end is connected to the exhaust pipe and a solenoid valve is provided at the connection. A one-way valve is provided at the connection between the smoke reflux pipe and the air inlet, and the one-way valve can only allow the refluxed smoke to flow from the smoke reflux pipe to the air intake pipe in one direction.

[0031] A plurality of supporting legs 4 are vertically fixedly connected to the bottom of the smoke filter device, and the lower ends of the supporting legs 4 are stably connected to the fixing plate 23, and a waste liquid collection reservoir 5 is installed on the fixing plate between the first and second supporting legs on the left side.

[0032] A waste liquid outlet is provided at the lower end of the liquid blower 6, and the waste liquid collection reservoir 5 is directly connected to the waste liquid outlet through a waste liquid collection pipe 8. There is a switch valve 7 at the connection port, and the switch valve 7 is controlled by a height sensor.

[0033] A smoke detector 16 is arranged on the inner wall of the discharge pipe 22. The smoke detector is arranged opposite to each other up and down in the discharge pipe 22. A control valve 18 is arranged behind the smoke detector. The solenoid valve 17 is located between the control valve and the smoke detector. The smoke detector is electrically connected to the control valve and the solenoid valve. The opening and closing of the control valve and the solenoid valve are electrically controlled by the smoke detector.

[0034] Due to the height of the left and right hollow baffles, there will be a certain absorption liquid gathering space between the hollow baffles. After the absorption liquid sprayed from the diversion sprayer falls, it will gradually accumulate in the area of ​​the absorption liquid gathering space. When the height of the absorption liquid accumulation does not reach the height set by the height sensor on the hollow baffle, the switch valve 7 connected to the waste liquid collection pipe 8 will remain in a closed state until the height of the absorption liquid accumulation reaches the standard. It can be opened. When the absorption liquid height reaches the design height of the height sensor, the switch valve between the waste liquid collection pipe and the waste liquid outlet is opened, and the absorption liquid flows through the waste liquid collection pipe to the waste liquid collection reservoir (the absorption liquid inlet flow rate is much smaller than the outlet flow rate at this time), and then the switch valve will be closed again to re-enter a new cycle.

[0035] The flue gas detector can detect the concentration of condensable particulate pollutants in the flue gas that has been secondary filtered in the absorption device. When the concentration reaches the emission requirement, the control valve opens and the solenoid valve closes. Qualified gas is discharged to the outside through the emission pipe. If the concentration does not meet the emission requirement, the solenoid valve opens and the control valve closes. At this time, unqualified flue gas is sent to the air intake pipe through the flue gas reflux mechanism and is re-processed using the pollutant absorption device.

[0036] Embodiment 2:

[0037] The utility model provides a method for absorbing pollutants of flue gas condensable particles, which adopts a pollutant absorption device for flue gas condensable particles as in Example 1, and the specific contents are as follows:

[0038] The flue gas after desulfurization and denitrification by the desulfurization tower and other devices enters the flue gas filtration device through the air intake pipe. The flue gas will be filtered twice before and after the flue gas filtration device, namely, primary filtration and secondary filtration.

[0039] The absorption liquid is initially stored in the absorption liquid storage reservoir, and the absorption liquid is pumped into the diversion sprayer in the flue gas preliminary filtration device through the liquid pump in the absorption liquid diversion system. There are multiple spray heads on the diversion sprayer. The absorption liquid is sprayed to the flue gas entering the spraying flue gas filtration device through the spray head. The absorption liquid sprayed from the diversion sprayer first absorbs the flue gas, and then gradually gathers in the absorption liquid gathering space between the left and right hollow baffles. The liquid fan driving device drives the liquid fan to rotate. During the rotation, the liquid fan will drive the absorption liquid in the absorption liquid gathering space to make a circular reciprocating motion up and down. During the circulation process, the absorption liquid contacts the flue gas above again and absorbs impurities in the flue gas again.

[0040] As the absorption liquid sprayed by the diversion sprayer gradually increases, the absorption liquid height in the absorption liquid accumulation space continues to increase. During the absorption liquid accumulation process, if the height does not meet the height requirement set by the height sensor, the switch valve connected to the waste liquid collection pipe will remain in a closed state until the absorption liquid height reaches the set height switch valve. When the absorption liquid height reaches the designed height of the height sensor, the switch valve between the waste liquid collection pipe and the waste liquid outlet is opened, and the absorption liquid flows through the waste liquid collection pipe to the waste liquid collection reservoir (the absorption liquid inlet flow rate is much smaller than the outlet flow rate at this time), and then the switch valve will be closed again to re-enter a new absorption liquid accumulation cycle.

[0041] After being filtered by the primary filtering device, the flue gas will pass through the secondary filtering system, and will be filtered for impurities again on the adsorbent layer, activated carbon layer and high-efficiency filter layer in turn, and then reach the emission pipe through the air outlet. The flue gas detector on the emission pipe will detect the flue gas indicators. If the flue gas meets the emission requirements, the flue gas detector will open the control valve and close the solenoid valve, and the qualified gas will be discharged to the outside through the emission pipe; if the concentration does not meet the emission requirements, the solenoid valve will be opened and the control valve will be closed. At this time, the unqualified flue gas will be sent to the air intake pipe through the flue gas reflux mechanism, and then pass through the air intake pipe to enter the pollutant absorption device for re-treatment.

[0042] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A pollutant absorption device for flue gas condensable particulate matter, characterized in that: including a smoke filtering device; The smoke filter device is provided with an air inlet and an air inlet pipe on the left side, the air inlet pipe is connected to the air inlet, and an air outlet and a discharge pipe are provided on the right side, the discharge pipe is connected to the air outlet; The smoke filtering device includes a preliminary smoke filtering device, which is composed of a diversion sprayer, a liquid fan, a height sensor, a hollow baffle body, and a liquid fan driving device. The hollow baffle body includes a left hollow baffle body and a right hollow baffle body. The preliminary smoke filtering device is provided with a left hollow baffle body, two side-by-side rotatable liquid fans and a right hollow baffle body from left to right. The diversion sprayer is located above the liquid fan. A height sensor is installed on the outer walls of the left and right hollow baffle bodies. A liquid fan driving device is respectively arranged inside the walls of the left and right hollow baffle bodies. The length of the right hollow baffle body can extend all the way to the right air outlet.

2. A pollutant absorption device for flue gas condensable particulate matter according to claim 1, characterized in that: The smoke filtering device also includes a secondary filtering device, which is located on the right side of the smoke primary filtering device and adjacent to the air outlet. The secondary filtering device consists of a triple filtering layer and a support platform. The upper and lower parts of the support platform are correspondingly arranged, and the lower part is arranged on the upper surface of the right hollow baffle body.

3. A pollutant absorption device for flue gas condensable particulate matter as claimed in claim 2, characterized in that: The triple filter layer is fixed on the support platform, and is arranged from left to right in sequence as an adsorbent layer, an activated carbon layer and a high-efficiency filter layer.

4. A pollutant absorption device for flue gas condensable particulate matter according to claim 1, characterized in that: The smoke filtering device also includes an absorption liquid diversion system, which consists of a diversion pipe, an absorption liquid storage reservoir and a liquid pump. One end of the diversion pipe is connected to the liquid outlet of the absorption liquid storage reservoir, and the other end is connected to the diversion sprayer. The liquid pump is installed on the diversion pipe.

5. The pollutant absorption device for flue gas condensable particulate matter according to claim 1, characterized in that: A plurality of supporting legs are vertically fixedly connected to the bottom of the smoke filter device, a fixing plate is arranged at the lower end of the supporting leg, and a waste liquid collection reservoir is installed on the fixing plate between the first and second supporting legs on the left side.

6. A pollutant absorption device for flue gas condensable particulate matter according to claim 5, characterized in that: A waste liquid outlet is provided at the lower end of the liquid blower, and the waste liquid collection reservoir is directly connected to the waste liquid outlet through a waste liquid collection pipeline. There is a switch valve at the connection port, and the switch valve is controlled by a height sensor.

7. The pollutant absorption device for flue gas condensable particulate matter according to claim 1, characterized in that: The hollow baffle bodies have a certain height, and the absorption liquid sprayed by the self-dividing sprayer can be accumulated between the hollow baffle bodies. The liquid fan driving device is electrically connected to the liquid fan.

8. The pollutant absorption device for flue gas condensable particulate matter according to claim 1, characterized in that: The smoke filtering device also includes a smoke reflux mechanism, which includes a smoke reflux pipe, a solenoid valve and a one-way valve. The left end of the smoke reflux pipe is connected to the air intake pipe, and the right end is connected to the exhaust pipe and a solenoid valve is provided at the connection. A one-way valve is provided at the connection between the smoke reflux pipe and the air inlet.

9. A pollutant absorption device for flue gas condensable particulate matter according to claim 8, characterized in that: A smoke detector is arranged on the inner wall of the discharge pipe. The smoke detector is arranged opposite to each other up and down in the discharge pipe. A control valve is arranged behind the smoke detector. The solenoid valve is located between the control valve and the smoke detector.

10. A pollutant absorption device for flue gas condensable particulate matter according to claim 9, characterized in that: The smoke detector is electrically connected to the control valve and the solenoid valve.

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