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Method for eliminating metal ions in rice hulls by utilizing industrial flue gas

一种工业烟气、金属离子的技术，应用在化学仪器和方法、固体废物的清除、碳酸盐/酸式碳酸盐的制备等方向，能够解决废水无法直接排放、强酸酸性大、欠缺经济性等问题，达到碳酸酸性弱、环境污染小、经济价值可观的效果

Active Publication Date: 2012-08-01
SUNSHINE KAIDI NEW ENERGY GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, strong acid is highly acidic, which is easy to cause harm to the human body and pollute the environment, and the waste water obtained after using it to treat rice husks cannot be discharged directly. economy

Method used

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  • Method for eliminating metal ions in rice hulls by utilizing industrial flue gas
  • Method for eliminating metal ions in rice hulls by utilizing industrial flue gas
  • Method for eliminating metal ions in rice hulls by utilizing industrial flue gas

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Experimental program
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Embodiment 1

[0027] Such as Figure 1~2 As shown, embodiment 1 of the present invention provides a kind of method utilizing industrial flue gas to remove metal ion in rice husk, and the steps are as follows:

[0028] 1. Set up a water storage reaction tank 1 with a depth of 7m and a length and width of 100m. At the bottom of the water storage reaction tank 1, there are 25 gas dispersion devices 2 for discharging industrial smoke. Horizontal or vertical vortex agitated gas injection holes (not shown), and industrial smoke is ejected from the gas injection holes. The fumarole is more than 1.5m above the bottom of the pool, and the aperture size is 0.01mm. The gas dispersing device 2 is also provided with a plurality of microporous aeration heads, and industrial smoke is ejected from the microporous aeration heads.

[0029] 2. Pack the rice husks 5 into bags and throw them into the water storage reaction tank 1 , and press the bagged rice husks 5 into the water surface using the bag pressin...

Embodiment 2

[0033] Such as image 3 As shown, Embodiment 2 of the present invention provides another method utilizing industrial flue gas to remove metal ions in rice husks, the steps are as follows:

[0034] Reaction tank 13 is set, and its structure is as image 3 As shown, the reaction tank 13 is 15m high and has an internal volume of 1000m 3 , a gas distributor 7 with a microporous aeration head is provided at the bottom of the reaction tank 13, a circulating liquid outlet 6 is provided on the tank wall of the reaction tank 13 below the gas distributor 7, and a gas outlet 10 is provided at the top of the reaction tank 13 , the bottom of the reaction tank 13 is a conical part 9 for collecting sediment, the bottom of the reaction tank 13 is provided with a sediment outlet 8, and the top of the reaction tank 13 is provided with a demister 12 and a liquid distributor 11, and the demister 12 is arranged above the liquid distributor 11.

[0035] When using the reaction tank 13, first fil...

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Abstract

The invention discloses a method for eliminating metal ions in rice hulls by utilizing industrial flue gas. The method comprises the following steps of: arranging a gas dispersing device for discharging industrial flue gas at the bottom of a water storage reaction tank, bagging and throwing the rice hulls into the water storage reaction tank, pressing the bagged rice hulls below the water surface, then, spraying the industrial flue gas in the tank through the gas dispersing device, increasing the solubility of carbon dioxide in the industrial flue gas in water by utilizing water pressure in the water storage reaction tank, reacting a generated carbonic acid solution and the metal ions in the rice hulls to generate sediment, after reacting, cleaning and extruding the rice hulls by using salt-free water, and eliminating the metal ions adsorbed on the rice hulls. According to the invention, the purpose of eliminating the metal ions in the rice hulls is achieved by introducing the industrial flue gas in water, dissolving carbon dioxide contained in the industrial flue gas in water to form carbonic acid, and reacting the carbonic acid with the rice hulls immersed in water; and the method provided by the invention has the characteristics of low pollution, low energy consumption and high-benefit circular economy.

Description

technical field [0001] The invention relates to the technical field of recycling of rice husks, in particular to a method for removing metal ions in rice husks by using industrial flue gas. Background technique [0002] my country is the largest rice producing country in the world. In 2008, the rice planting area reached about 430 million mu, the total output was about 189 million tons, and nearly 40 million tons of rice husks could be produced. The total annual rice husks in the world reached more than 68 million Ton. Rice husk is composed of water, organic matter (lignin, cellulose, hemicellulose), amorphous silica, and a small amount of metal ions. In the past, rice husks were often only ground into bran and added to feed. With the continuous development of science and technology, new breakthroughs have been made in the utilization of rice husks, and many new industrial models have been born, such as rice husk power generation, rice husk gasification to oil , rice husks ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18B82Y40/00A23L7/10C01B32/60
CPCC01B31/24B82Y40/00C01B33/18A23L5/276A23L7/115B09B3/00C01B32/60B09B5/00A23L5/23C01G49/00A23V2002/00
Inventor 陈义龙张岩丰陶磊明罗文学王志龙罗志相薛永杰
Owner SUNSHINE KAIDI NEW ENERGY GROUP CO LTD