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Fixed bed for continuously neutralizing acidic wastewater and application method thereof

A technology of acid waste water and fixed bed, which is applied in the field of chemical equipment, can solve the problems of large investment in equipment, large amount of labor, poor working environment, etc., and achieve the effect of reducing workload and improving safety

Active Publication Date: 2015-11-18
JIANGSU CHANGJILI NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low pH value of the water, if it is directly input into the circulation system without acid neutralization, it will seriously damage the equipment and cause huge economic losses. Therefore, acid neutralization of acid wastewater generated in industrial production is the first choice for acid wastewater treatment. The primary task
[0003] At present, acidic wastewater generated in industrial production is generally neutralized by alkaline substances such as sodium hydroxide, calcium hydroxide, sodium carbonate, and sodium bicarbonate. This type of method has the advantages of sufficient neutralization and accurate adjustment. A large amount of labor is required, and the working environment is poor. If calcium hydroxide is used for neutralization, centrifugal or filter press machinery can be used to keep the clarification of the discharge water up to standard. The product operation is complicated and the investment in equipment is large.

Method used

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  • Fixed bed for continuously neutralizing acidic wastewater and application method thereof
  • Fixed bed for continuously neutralizing acidic wastewater and application method thereof
  • Fixed bed for continuously neutralizing acidic wastewater and application method thereof

Examples

Experimental program
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Embodiment 1

[0033] like figure 1 As shown, a fixed bed for continuously neutralizing acidic wastewater, the fixed bed includes a bed body 1, an acidic wastewater inlet 2, a drain, slag removal, and flushing port 3, a slag collection chamber 4, a neutral water outlet 5, and a porous support Plate 6; Wherein, bed body 1 is inverted funnel shape, is divided into upper bed body 1-1 and lower part bed body 1-2, and upper bed body 1-1 opens naturally, communicates with air, and lower bed body 1-2 is connected with collector. The slag chamber 4 is connected, and the two are separated by a porous support plate 6; the interior of the bed 1 is filled with calcium carbonate particles 7, the slag collection chamber 4 is filled with pebbles 12, and the porous support plate 6 isolates the calcium carbonate particles 7 from the pebbles 12; The contact surface between the calcium carbonate particles 7 and the air of 1-1 is a peak shape with a high middle and low ends, producing a neutral water overflow s...

Embodiment 2

[0040] A method for continuously neutralizing acidic waste water in a fixed bed, comprising the steps of: closing the discharge, slag removal, flushing port 3, agitating opening 10, neutral water outlet 5, and acidic waste water inlet 2 at a flow rate of 2-3 tons / hour Pass neutral water into the bed body 1 until the calcium carbonate particles 7 are all soaked, the neutral water overflows the peak of the contact surface between the calcium carbonate particles 7 and the air, open the neutral water outlet 5, and continue to use 0.5-1.5 tons / Hours of flow into the acid wastewater, until the end of the current round of acid wastewater neutralization.

[0041] In the process of neutralizing the acidic wastewater, while feeding the acidic wastewater, mix neutral water into the acidic wastewater inlet 2 at a flow rate of 0.5-1.0 tons / hour to ensure the mass fraction of acidic substances in the acidic wastewater fed into the device ≤8%.

[0042] During the use of the device, calcium...

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Abstract

The invention belongs to the technical field of chemical equipment, and provides a fixed bed for continuously neutralizing acidic wastewater and a method for continuously neutralizing acidic wastewater by using the fixed bed. The fixed bed comprises a bed body (1), an acidic wastewater inlet (2), an evacuation-deslagging-flushing port (3), a slag collection chamber (4), a neutral water outlet (5) and a porous supporting plate (6). The method comprises the following steps: by using lithium carbonate granules as the raw material, arranging the special fixed bed tower, filling the calcium carbonate granules into the fixed bed tower, and sending the acidic wastewater from the tower bottom to react with the calcium carbonate so as to generate a calcium salt and carbon dioxide, wherein the calcium salt is dissolved in the wastewater, the carbon dioxide is freely discharged from the tower top, and the water discharged from the tower top is neutral water with the pH value of 6.5 or so; and regulating the pH value to 7-9 by using a trace amount of sodium hydroxide water solution, thereby satisfying the sewage pipe network standards.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment, and relates to a fixed bed for continuously neutralizing acid waste water and a method for continuously neutralizing acid waste water with the fixed bed. Background technique [0002] The acidic wastewater produced in industrial production is corrosive. If it is directly discharged into the environment, it will greatly damage the environment. From the perspective of water saving and energy saving, the reuse of wastewater is the best treatment method for industrial acidic wastewater. However, due to the low pH value of the water, if it is directly input into the circulation system without acid neutralization, it will seriously damage the equipment and cause huge economic losses. Therefore, acid neutralization of acid wastewater generated in industrial production is the first choice for acid wastewater treatment. The primary task. [0003] At present, acidic wastewater generated in indu...

Claims

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Application Information

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IPC IPC(8): C02F1/66
Inventor 周卫强戴俊涛储鹏陈浩谢云良
Owner JIANGSU CHANGJILI NEW ENERGY TECH CO LTD