Smoke purification system

Abstract

The present application relates to a smoke purification system. The system includes a scrubber and a desulfurization tower. The scrubber includes a scrubbing chamber, a smoke inlet and a smoke outlet connected to the scrubbing chamber, and a nozzle disposed between the smoke inlet and the smoke outlet and used to spray scrubbing liquid into the scrubbing chamber. The desulfurization tower includes a working chamber, an air inlet and an exhaust port connected to the working chamber, and a purification component disposed in the working chamber and located between the air inlet and the exhaust port, wherein the air inlet is connected to the smoke outlet. The solution reduces the content of pollutants in the exhaust gas and meets the emission standards.

Description

Technical Field

[0001] The present application relates to the technical field of smoke purification, and in particular to a smoke purification system. Background Art

[0002] As the country's environmental protection requirements for enterprises continue to increase, according to the new industry emission requirements, the emission limits for particulate matter, SO2, sulfuric acid mist and NOx are required to be 10mg / m 3 , 100mg / m 3 , 20mg / m 3 and 100 mg / m 3 The emission limits for heavy metals such as lead and arsenic are 0.7 mg / m 3 and 0.4 mg / m 3 , which is basically several times lower than the original emission limit standard. The original purification equipment can no longer meet the requirements of the new emission standard. Summary of the invention

[0003] The present application provides a smoke purification system that can meet emission requirements.

[0004] A smoke purification system, comprising:

[0005] The scrubber comprises a scrubbing chamber, a smoke inlet and a smoke outlet communicated with the scrubbing chamber, and a nozzle disposed between the smoke inlet and the smoke outlet and used for spraying scrubbing liquid into the scrubbing chamber;

[0006] The desulfurization tower comprises a working chamber, an air inlet and an exhaust port connected to the working chamber, and a purification component arranged in the working chamber and located between the air inlet and the exhaust port, wherein the air inlet is connected to the smoke outlet.

[0007] Optionally, the scrubber includes a connected straight pipe and a three-way pipe, the straight pipe is provided with the smoke inlet, the three-way pipe is provided with the nozzle, the three-way pipe is also provided with a first opening, a second opening and a third opening, the first opening is connected to the washing chamber, the second opening is formed as the air inlet, and the third opening is used to discharge the washing liquid.

[0008] Optionally, a plurality of the nozzles are provided, and the plurality of nozzles are provided at the first opening and are spaced apart along the circumference of the first opening.

[0009] Optionally, the scrubber further comprises a telescopic compensator, wherein the telescopic compensator connects the second opening with the air inlet, and the telescopic compensator is telescopic in a direction from the second opening to the air inlet.

[0010] Optionally, the diameter of the straight pipe is smaller than the diameter of the three-way pipe, the first opening is set as a tapered opening, and the small end of the first opening is connected to the straight pipe.

[0011] Optionally, the desulfurization tower includes a liquid storage area at the bottom, and the third opening is connected to the liquid storage area.

[0012] Optionally, the purification component includes a multi-stage spray component, and the multi-stage spray components are arranged in sequence at intervals along the height direction of the desulfurization tower.

[0013] Optionally, the purification component further includes a defogger component, and the defogger component is arranged on a side close to the exhaust port.

[0014] Optionally, the defogger assembly includes a primary defogger assembly and a secondary defogger assembly, and the primary defogger assembly and the secondary defogger assembly are arranged in sequence along the height direction of the desulfurization tower.

[0015] Optionally, the smoke purification system further includes a support frame, and the scrubber is supported on the support frame.

[0016] The present application provides a smoke purification system, wherein a washing chamber is provided for smoke to be purified to enter, and a nozzle is used to spray a cleaning liquid into the washing chamber. In the washing chamber, the smoke can contact and collide with the washing liquid in reverse to generate a turbulent zone, in which the smoke and the washing liquid undergo rapid and continuous mass and heat transfer, the dust is efficiently removed, and the acidic gas is absorbed, and then enters the working chamber of a desulfurization tower, where it is cooled and purified again by a purification component, and is cooled and pollutants are removed again, thereby reducing the content of pollutants in the exhaust gas and meeting emission standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of a smoke purification system shown in an exemplary embodiment of the present application;

[0018] Figure 2 yes Figure 1 A top view of the smoke purification system is shown in FIG. DETAILED DESCRIPTION

[0019] Here, exemplary embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application.

[0020] The terms used in this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate quantity restrictions, but indicate that there is at least one, and will be separately described if only "one" is referred to. "Multiple" or "several" means two or more. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper", "top", "bottom" are only for the convenience of explanation, and are not limited to one position or one spatial orientation. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. The words "connected" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0021] Please refer to Figure 1 , Figure 1 Schematic diagram of a smoke purification system 100 shown in an exemplary embodiment of the present application.

[0022] The present application provides a smoke dust purification system (hereinafter referred to as the system), the system 100 includes a scrubber 10 and a desulfurization tower 20. The scrubber 10 is arranged upstream of the desulfurization tower 20, and the smoke dust enters the desulfurization tower 20 after being purified and cooled by the scrubber 10.

[0023] The scrubber 10 includes a scrubbing chamber 11, a smoke inlet 12 connected to the scrubbing chamber 11, a smoke outlet 13, and a nozzle 14 disposed between the smoke inlet 12 and the smoke outlet 13 and used to spray scrubbing liquid into the scrubbing chamber 11. In order to increase the flow rate of the scrubbing liquid, a plurality of nozzles 14 can be provided. The smoke inlet 12 can be connected to the smelting furnace through a connecting pipe 200, and the smoke generated by the smelting furnace can directly enter the smoke purification system 100. Figure 1 In the embodiment shown, the scrubber 10 is placed vertically, smoke and dust flow from top to bottom into the scrubbing chamber 11, and the nozzle 14 sprays from bottom to top. For example, the scrubber 10 can be provided with the scrubbing chamber 11 by a circulating pump and a circulating liquid pipeline.

[0024] The desulfurization tower 20 includes a working chamber 21, an air inlet 22 and an exhaust port 23 connected to the working chamber 21, and a purification component 24 disposed in the working chamber 21 and located between the air inlet 22 and the exhaust port 23, wherein the air inlet 22 is connected to the smoke outlet 13. The air inlet 22 is disposed at the front side of the purification component 24, and the exhaust port 23 is disposed at the rear side of the purification component 24. The "front side" and "rear side" mentioned here refer to the flow direction of the flue gas. Figure 1 The arrows in the figure show the direction of smoke flow. Figure 1 In the illustrated embodiment, the air inlet 22 is disposed at the bottom of the working chamber 21 , and the air outlet 23 is disposed at the top of the working chamber 21 .

[0025] According to the above description, after the smoke containing pollutants enters the washing chamber 11, it flows along the washing chamber 11. At the same time, the nozzle 14 sprays in the opposite direction of the smoke flow. In the washing chamber 11, the smoke can contact and collide with the washing liquid in reverse to produce a turbulent zone. In this area, the smoke and the washing liquid undergo rapid and continuous mass transfer and heat transfer, the dust is efficiently removed, and the acidic gas is absorbed. Then, it enters the working chamber 21 of the desulfurization tower, and is cooled and purified again by the purification component 24 in the working chamber 21, and is further cooled and pollutants are removed, thereby reducing the content of pollutants in the exhaust gas to meet the emission standards.

[0026] In one embodiment, the scrubber 10 includes a straight pipe 101 and a three-way pipe 102 connected to each other, wherein the straight pipe 101 is provided with the smoke inlet 12, and the cavity in the straight pipe 101 forms a washing chamber 11. The nozzle 14 is provided on the three-way pipe 102, and the three-way pipe 102 is provided with a first opening 1a, a second opening 1b and a third opening 1c, wherein the first opening 1a is connected to the washing chamber 11, the second opening 1b is formed as a smoke outlet 13, and the third opening 1c is used to discharge washing liquid. With such a configuration, the purification of smoke and the separation of gas and liquid during the flow process can be achieved by connecting the straight pipe 101 and the three-way pipe 102, and the structure is simple and easy to implement. The straight pipe 101 and the three-way pipe 102 can be separately provided, and the two are provided with a detachable connection, which is not only convenient for processing, but also convenient for maintenance and replacement.

[0027] exist Figure 1 In the embodiment shown, the diameter of the straight tube 101 is smaller than the diameter of the third through tube 102. The first opening 1a is configured as a conical opening, and the small end of the first opening 1a is connected to the straight tube 101. With such a configuration, the smoke entering the washing chamber 11 can be concentrated in a relatively small space, so that the smoke can reliably form a turbulent zone when colliding with the washing liquid in the washing chamber 11, and the cooling and purification effect of the smoke is better. On the other hand, the larger diameter of the three-way tube 102 can ensure a larger flow area.

[0028] In an optional embodiment, the diameter of the straight pipe 101 is set to 2000 mm, the diameter of the small end of the first opening 1a is set to 2000 mm, and the diameter of the large end of the first opening 1a is set to 2500 mm. The diameter of the tee pipe 102 at the second opening 1b and the third opening 1c is set to 2500 mm.

[0029] In one embodiment, the desulfurization tower 20 includes a liquid storage area 25 at the bottom, and the third opening 1c is connected to the liquid storage area 25. When the flue gas and liquid are in momentum balance in the scrubbing chamber 11, the separated liquid can flow into the liquid storage area 25 of the desulfurization tower 20 through the third opening 1c.

[0030] In one embodiment, the nozzles 14 are provided in plurality, and the plurality of nozzles 14 are arranged in the first opening 1a and spaced apart along the circumference of the first opening 1a. In this way, the washing liquid can be sprayed into the washing chamber 11 through the plurality of nozzles 14, thereby increasing the flow rate of the washing liquid and ensuring sufficient contact between the smoke and the washing liquid. Figure 1 In the illustrated embodiment, there are three nozzles 14 , which are spaced apart and evenly distributed at 120°.

[0031] In one embodiment, the scrubber 10 further includes a telescopic compensator 15, the telescopic compensator 15 connects the second opening 1b with the air inlet 22, and the telescopic compensator 15 is telescopic in the direction from the second opening 1b to the air inlet 22. The telescopic compensator 15 is used to compensate for the thermal expansion and contraction of the pipeline connecting the scrubber 10 and the desulfurization tower 20. The telescopic compensator 15 can be a telescopic bellows, but is not limited thereto.

[0032] In one embodiment, the purification assembly 24 includes a multi-stage spray assembly 241, which is arranged in sequence along the height direction of the desulfurization tower 20. The multi-stage spray assembly 241 performs gas-liquid separation in the tower. For example, the gas passes through the multi-stage spray assembly 241 from bottom to top, and performs rapid and continuous mass and heat transfer with the liquid surface again, the dust is eluted and the acid gas is further absorbed, and the mixture of liquid and solid falls to the bottom of the tower and is discharged.

[0033] In one embodiment, the purification assembly 24 further includes a demister assembly 242, which is disposed above the multi-stage spray assembly 241. The demister assembly 242 can remove the remaining droplets, and the purified flue gas can be discharged out of the tower, for example, through a chimney.

[0034] The demisting assembly 242 may be provided in plurality, for example, it may include a primary demisting assembly and a secondary demisting assembly, and the primary demisting assembly and the secondary demisting assembly are sequentially arranged along the height direction of the desulfurization tower 20. The structures of the primary demisting assembly and the secondary demisting assembly may be the same or different.

[0035] In one embodiment, the system 100 further includes a support frame 30, and the scrubber 10 is supported on the support frame 30. The support frame 30 can ensure stable operation and safe and convenient operation of the scrubber 10. The support frame 30 can be a steel structure frame, but is not limited thereto.

[0036] In one embodiment, the washing liquid may be limestone slurry, and the chemical formula is:

[0037] CaCO3+SO2+1 / 2H2O→CaSO3·1 / 2H2O+CO2↑

[0038] Ca(OH)2+SO2→CaSO3·1 / 2H2O+1 / 2H2O

[0039] CaSO3·1 / 2H2O+SO2+1 / 2H2O→Ca(HSO3)2

[0040] In one embodiment, in the desulfurization tower 20, oxygen in the exhaust gas or air fed into the original desulfurization tower can oxidize calcium sulfite and calcium bisulfite into gypsum, and the chemical equation is:

[0041] 2CaSO3·1 / 2H2O+O2+3H2O→2CaSO4·2H2O

[0042] Ca(HSO3)2+1 / 2O2+H2O→CaSO4·2H2O+SO2↑

[0043] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A smoke purification system, characterized in that: include: The scrubber comprises a scrubbing chamber, a smoke inlet and a smoke outlet communicated with the scrubbing chamber, and a nozzle disposed between the smoke inlet and the smoke outlet and used for spraying scrubbing liquid into the scrubbing chamber; The desulfurization tower comprises a working chamber, an air inlet and an exhaust port connected to the working chamber, and a purification component arranged in the working chamber and located between the air inlet and the exhaust port, wherein the air inlet is connected to the smoke outlet.

2. The smoke purification system according to claim 1, characterized in that: The scrubber includes a straight pipe and a three-way pipe connected to each other, the straight pipe is provided with the smoke inlet, the three-way pipe is provided with the nozzle, and the three-way pipe is also provided with a first opening, a second opening and a third opening, the first opening is connected to the washing chamber, the second opening is formed as the air inlet, and the third opening is used to discharge the washing liquid.

3. The smoke purification system according to claim 2, characterized in that: A plurality of nozzles are provided, and the plurality of nozzles are provided at the first opening and are arranged at intervals along the circumferential direction of the first opening.

4. The smoke purification system according to claim 2, characterized in that: The scrubber further includes a telescopic compensator, which connects the second opening with the air inlet, and the telescopic compensator is telescopic in a direction from the second opening to the air inlet.

5. The smoke purification system according to claim 4, characterized in that: The diameter of the straight pipe is smaller than the diameter of the three-way pipe, the first opening is set as a tapered opening, and the small end of the first opening is connected to the straight pipe.

6. The smoke purification system according to claim 2, characterized in that: The desulfurization tower includes a liquid storage area at the bottom, and the third opening is connected to the liquid storage area.

7. The smoke purification system according to any one of claims 1 to 6, characterized in that: The purification component includes a multi-stage spray component, and the multi-stage spray components are arranged in sequence at intervals along the height direction of the desulfurization tower.

8. The smoke purification system according to claim 7, characterized in that: The purification component also includes a defogger component, and the defogger component is arranged on a side close to the exhaust port.

9. The smoke purification system according to claim 8, characterized in that: The demisting assembly comprises a primary demisting assembly and a secondary demisting assembly, and the primary demisting assembly and the secondary demisting assembly are arranged in sequence along the height direction of the desulfurization tower.

10. The smoke purification system according to any one of claims 1 to 6, characterized in that: The smoke purification system further comprises a support frame, and the scrubber is supported on the support frame.

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