A method for trapping and removing benzopyrene in flue gas

A benzopyrene and flue gas technology is applied in the field of environmental protection flue gas treatment, which can solve the problems of high cost, difficulty in large-scale industrial flue gas treatment, and large resistance.

Active Publication Date: 2022-04-26
SHENYANG DONGDASHANHUI ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent No. 201320638838.4(22) once proposed a treatment plan, which is difficult to use in large-scale industrial flue gas treatment due to complex operation, high cost and too much resistance

Method used

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  • A method for trapping and removing benzopyrene in flue gas
  • A method for trapping and removing benzopyrene in flue gas
  • A method for trapping and removing benzopyrene in flue gas

Examples

Experimental program
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Effect test

Embodiment 1

[0036] In a carbon factory, the flue gas from the carbon production process contained 15 μg / m of benzopyrene 3 , the local environmental protection department requires that its emission shall not exceed 2.5μg / m 3 , which is seriously exceeded. Because there is no mature technology for governance at present, the technology of this embodiment is used for experimentation. The exhaust gas temperature is 205°C, and the dust after cyclone dust removal is 30mg / m 3 , tar 50mg / m 3 .

[0037] A device for trapping and removing benzopyrene in flue gas, the front view is as follows figure 1 As shown, the top view is as figure 2 As shown, the left view is as image 3 As shown, the schematic diagram of the trapping bundle structure is shown in Figure 4 As shown, the structure includes 1-housing, 2-flue gas inlet, 3-pressure equalizing plate, 4-capture chamber, 5-upper cover, 6-flue gas outlet, 7-leading groove, 8-removing section guide groove , 9-guide groove of the moving-in sect...

Embodiment 2

[0050] The flue gas volume of the roasting production line of a carbon factory is 6000Nm 3 / h, the exhaust gas temperature is 280°C, and the dust after the initial dust removal treatment is 35mg / m 3 , tar 100mg / m 3 , Benzopyrene 17μg / m 3 . All exceed local environmental protection requirements. Therefore, this case is adopted for governance.

[0051] A device for trapping and removing benzopyrene in flue gas, the front view is as follows figure 1 As shown, the top view is as figure 2 As shown, the left view is as image 3 As shown, the schematic diagram of the trapping bundle structure is shown in Figure 4 As shown, the structure includes 1-housing, 2-flue gas inlet, 3-pressure equalizing plate, 4-capture chamber, 5-upper cover, 6-flue gas outlet, 7-leading groove, 8-removing section guide groove , 9-guide groove of the moving-in section, 10-isostatic plenum of the moving-out section, 11-isostatic plenum of the moving-in section, 12-valve plate of the isostatic plenu...

Embodiment 3

[0067] Smoked chicken production line of a food processing factory, the maximum amount of smoke is 500Nm 3 / h, the exhaust gas temperature is 165°C, and the benzopyrene in the flue gas reaches 15 μg / m 3 , at the same time containing liquid oil droplets 40mg / m 3 , carbon black dust 20mg / m 3 , all exceeding local emission standards. Adopt this patent equipment to manage.

[0068] A device for trapping and removing benzopyrene in flue gas, the front view is as follows figure 1 As shown, the top view is as figure 2 As shown, the left view is as image 3 As shown, the schematic diagram of the trapping bundle structure is shown in Figure 4 As shown, the structure includes: a shell 1, a trapping chamber 2, a flue gas inlet 3, a flue gas outlet 4, a pressure equalizing plate 6, an upper cover plate 7, a liquid collection tank 8, a liquid discharge port 9 and a smoke exhaust chimney 10; The collection chamber is filled with capture bundles 11; the material of the capture bundl...

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Abstract

A method for trapping and removing benzopyrene in flue gas according to the present invention selects special material trapping bundles and arranges them in multiple layers in the trapping and removing chamber, so that turbulent impact is generated when the flue gas passes through the device, and the benzopyrene in the flue gas Benzopyrene and its associated organic droplets are adsorbed and captured when they collide with a special trapping beam. When the adsorbed droplets gather to a certain amount, they flow into the liquid collection tank by gravity, and the droplets entrained in the flue gas pass through each layer of trapping beams. There will be impact turbulence, and the droplets and solid particles will also collide with each other and grow up. The density of the liquid droplet is much higher than that of the gas. When the airflow collides with the trapping beam, the kinetic energy and inertia of the droplet are large. The substance has a small surface tension. When the adsorbed substance collides with the trapping beam, it will be adsorbed and captured by the surface of the trapping beam, so as to realize the trapping and removal of solid benzopyrene, avoid the heating of the flue gas and achieve the energy saving effect.

Description

technical field [0001] The invention belongs to the field of environmental protection flue gas treatment, in particular to a method for trapping and removing benzopyrene in flue gas. Background technique [0002] Benzopyrene is an aromatic hydrocarbon, melting point: 178-179.3°C, boiling point: 310-312°C, insoluble in water, vapor pressure 0.665 at 25°C × 10 -19 , is an indirect high carcinogen. Produced in high-temperature anoxic pyrolysis of organic matter such as coal, coking, carbon, metallurgical sintering, and kilns produced by refractory materials will produce a large amount of benzopyrene. Our daily barbecue and high-temperature cooking will also produce a small amount of benzopyrene. At present There is no good governance method. Patent No. 201320638838.4(22) once proposed a treatment plan, which is difficult to use in large-scale industrial flue gas treatment due to complex operation, high cost and too much resistance. It is urgent to develop new treatment meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D45/08B01D45/18
CPCB01D45/08B01D45/18B01D50/00
Inventor 孙中强厉瑞燕
Owner SHENYANG DONGDASHANHUI ENVIRONMENTAL TECH CO LTD
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