Method for removing harmful gas and heavy metal in carbon black tail gas

A technology for harmful gases and heavy metals, applied in separation methods, chemical instruments and methods, air quality improvement, etc., can solve the problems of poor recycling effect of catalysts, short service life of catalysts, complex reaction devices, etc., and achieve the effect of internal recycling of catalysts Good, long service life, simple reaction device

Active Publication Date: 2013-07-17
山西永东化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese invention patent with the patent number of 200710045443.2 uses humate to produce compound fertilizers through simultaneous desulfurization and denitrification, which achieves the greatest degree of emission reduction from the perspective of comprehensive utilization; the Chinese invention patent with the patent number of 200910053740.0 uses an integrated coupling device for flue gas desulfurization and dust removal At the same time of desulfurization, the problem of reducing the pollution of powder particles is considered, but the function of reducing emissions is still relatively small; the Chinese patent application number is 200610028333.0, which strengthens the mercury removal effect of the wet flue gas desulfurization system, and removes flue gas while desulfurizing Mercury metal ion
The main problems in the prior art are that the reaction device is complicated, the recycling effect of the catalyst is poor, the service life of the catalyst is short, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: The components and contents of the yeast wastewater associated with the beer production process in terms of weight percent are: 0.015% phenol, 0.01% diatomaceous earth, 0.20% yeast protein, 0.05% cellulose, 0.5% potassium dihydrogen phosphate, water 99.225%.

[0017] The dead branches, fallen leaves and yeast wastewater were mixed evenly at a weight ratio of 0.015:30.00:69.985, and placed at 30°C for 72 hours for biochemical reaction.

[0018] Maturity was determined by the weight loss method, and the CO released from the mixture 2 When the amount is lower than 150mg / kg.h, the litter in the mixture is taken out, and extruded and granulated by an extrusion granulator under a pressure of 2.5MPa to form granules with a size of 2mmX3mm.

[0019] At 130°C, dry the above particles in a microwave dryer for 0.25h, which can remove 75% of the water in the particles.

[0020] Put it into the packing chamber of the heat pipe GGH, and let it stand for 5 h at 330 °C und...

Embodiment 2

[0023] Example 2: The components and contents of the yeast wastewater associated with the beer production process are as follows: 0.017% phenol, 0.012% diatomaceous earth, 0.15% yeast protein, 0.10% cellulose, 0.8% potassium dihydrogen phosphate, water 98.921%.

[0024] The dead branches, fallen leaves and yeast wastewater were mixed evenly at a weight ratio of 0.02:25.00:74.88, and placed at 37°C for 65 h for biochemical reaction.

[0025] Maturity was determined by the weight loss method, and the CO released from the mixture 2 When the amount is lower than 180mg / kg.h, the litter in the mixture is taken out, and extruded and granulated by an extrusion granulator under a pressure of 3.0MPa to form granules of 2mmX5mm.

[0026] At 150°C, dry the above particles in a microwave dryer for 0.20h to remove 80% of the moisture in the particles.

[0027] Put it into the packing chamber of the heat pipe GGH, and put it under a nitrogen atmosphere at 350 °C for 6 h for activation trea...

Embodiment 3

[0030] Example 3: The components and contents of the yeast wastewater associated with the beer production process in terms of weight percent are: 0.01% phenol, 0.02% diatomaceous earth, 0.25% yeast protein, 0.15% cellulose, 0.8% potassium dihydrogen phosphate, water 98.77%.

[0031] The dead branches, fallen leaves and yeast wastewater were mixed evenly at a weight ratio of 0.01:39.00:60.99, and placed at 25°C for 92 h for biochemical reaction.

[0032] Decomposition was determined by the polyethylene bag method, and the CO released from the mixture 2 When the amount is lower than 120mg / kg.h, the litter in the mixture is taken out, and extruded and granulated by an extrusion granulator under a pressure of 2.9MPa to form granules of 3mmX3mm.

[0033] Dry the granules in a microwave dryer at 120°C for 0.35h to remove 70% of the moisture in the granules.

[0034] Put it into the packing chamber of the heat pipe GGH, and put it under a nitrogen atmosphere at 350 °C for 3 h for a...

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PUM

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Abstract

The invention discloses a method for removing harmful gas and heavy metal in carbon black tail gas. A catalyst is good in internal recycling effect, and long in service life. The method comprises the steps of: firstly, mixing deadwood, fallen leaves and yeast wastewater according to the ratio, and laying aside for 5-120 hours; taking out the deadwood and fallen leaves in the mixture when the CO2 content released in the mixture is lower than 120-180mg / kg.h; extruding and pelletizing by a squeezing granulator, forming (2-3mm)*(3-5mm) of particulate matters; drying the particulate matters in a microwave dryer and removing 60-80% of moisture; putting into a heat-tube GGH (gas-gas heater) packing chamber, stewing for 3-10 hours to activate in nitrogen of 200-350 DEG C; adding one or more of monopotassium phosphate KH2PO4, dipotassium phosphate K2HPO4, tripotassium phosphate K3PO4 or potassium pyrophosphate K4P2O7 to yeast wastewater, preparing modified yeast water; feeding the improved yeast water into the heat-tube GGH packing chamber at the flow speed of 0.2-0.6m / s from top to bottom, and removing the harmful gas and heavy metal in the carbon black tail gas by the cross action with high-temperature carbon black tail gas at 101-350 DEG C from bottom to top.

Description

technical field [0001] The invention relates to a method for removing harmful gas SO from carbon black tail gas 2 , NO, NO 2 and heavy metal methods. Background technique [0002] Coal tar heavy oil and coal tar pitch are the main raw materials for the production of organic chemical products such as carbon black and carbon fiber. Rational use of rich CO, H 2 、C n h 2n+2 Calorific value of carbon black tail gas in combined power generation is one of the energy-saving measures, and effective treatment can reduce the amount of SO 2 , NO, NO 2 and heavy metal carbon black tail gas emission, which has a positive effect on environmental protection and prevention of smog formation. The Chinese invention patent with the patent number of 200710045443.2 uses humate to produce compound fertilizers through simultaneous desulfurization and denitrification, which achieves the greatest degree of emission reduction from the perspective of comprehensive utilization; the Chinese inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/90B01D53/78B01D53/60B01D53/64B01J31/26
CPCY02A50/20
Inventor 刘东玉刘东良张巍周霞萍
Owner 山西永东化工股份有限公司
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