Acidic waste water treatment device and using method thereof

A technology of acid waste water and treatment device, applied in water treatment, environmental protection, chemical industry, can solve the problem of acid waste water being difficult to treat, and achieve the effect of reducing the total amount

Pending Publication Date: 2017-09-15
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide an acidic wastewater treatment device to solve the problem that a large amount of acidic wastewater is difficult to handle in the production of acid from flue gas from non-ferrous metal smelting

Method used

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  • Acidic waste water treatment device and using method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1、70

[0034] Embodiment 1, 700,000 tons of sulfuric acid system:

[0035] Use the acid water supplement pump 5 to send the acidic waste water into the evaporation tower 13. After reaching a certain liquid level, turn on the evaporation tower circulation pump 14, and the dry flue gas passing into the absorption tower 3 has a water content of ≤0.1g / m 3 , the flue gas volume at gas inlet 4 of the evaporation tower is 226976Nm 3 / h-258278Nm 3 / h, temperature: 61-69°C, the flue gas is in countercurrent contact with the top-to-bottom spray acid water of the spray device 15, and part of the moisture in the acid water is taken away, and the moisture content of the flue gas reaches 3-4g / m 3 Then enter the tail suction tower 21, after the gas is treated up to the standard through the tail suction tower 21, it enters the exhaust chimney 22 from the tail suction tower gas outlet 23 and discharges up to the standard.

[0036] In this embodiment, the evaporation tower supplements 700m of acid w...

Embodiment 2、48

[0037] Embodiment 2, 480,000 tons of sulfuric acid system:

[0038] Use the acid water supplement pump 5 to send the acidic waste water into the evaporation tower 13. After reaching a certain liquid level, turn on the evaporation tower circulation pump 14, and the dry flue gas passing into the absorption tower 3 has a water content of ≤0.1g / m 3 , the flue gas volume at gas inlet 4 of the evaporation tower is 157982Nm 3 / h-178469Nm 3 / h, temperature: 71-77°C, the flue gas is in countercurrent contact with the top-to-bottom spray acid water of the spray device 15, and part of the moisture in the acid water is taken away, and the moisture content of the flue gas reaches 6-7g / m 3 Then enter the tail suction tower 21, after the gas is treated up to the standard through the tail suction tower 21, it enters the exhaust chimney 22 from the tail suction tower gas outlet 23 and discharges up to the standard.

[0039] In this embodiment, the evaporation tower supplements acid water 245...

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Abstract

The invention discloses an acidic wastewater treatment device and a use method thereof, belongs to the technical field of chemical industry, environmental protection and water treatment, and solves the problem that a lot of acidic waste water produced in production of acids from non-ferrous metal smelting off-gas is difficult to treat. The acidic wastewater treatment device comprises a washing tower, an absorption tower, a filtering pressing separating device, an evaporating concentrating device and a tail gas discharging device, and the process comprises filter pressing purification, evaporation concentration and tail gas discharge. External discharge acid wastewater from the washing tower drainage of the purification system is beaten into a filter press for filter pressing purification for removal of acid sludge, impurities and the like in the acid wastewater, filtration slag is sent into smelting for recycling, the waste material is recycled, filtrate is sent into an evaporating tower, in the evaporating tower, the acid wastewater is sprayed and in countercurrent contact with a low water content dry flue gas entering the evaporating tower from the outlet of the absorption tower for adiabatic evaporation of the acid wastewater, and part of water in the acid wastewater is transformed from liquid state to gas state, so that the low water content dry flue gas carries water vapor to take away a lot of water so as to achieve acid wastewater evaporation and concentration and reduction of the total amount of the external discharge acid wastewater.

Description

technical field [0001] The invention belongs to the technical fields of chemical industry, environmental protection and water treatment, and in particular relates to an acid wastewater treatment device and a use method thereof. Background technique [0002] During the acid wet scrubbing process of flue gas from nickel-copper smelting, a large amount of acidic wastewater is produced, polluting the environment, and the acidic wastewater needs to be treated and discharged after reaching the standard. Due to the large amount of acid wastewater, the scale of acid wastewater treatment equipment and facilities is large, and the treatment cost is high. At present, the commonly used acid water concentration method at home and abroad is to use steam to heat and evaporate the acid water. It is difficult to select equipment, consumes a lot of steam, and the concentration cost is high. During the acid production process, the gas at the outlet of the absorption tower of the conversion sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F103/16
CPCC02F1/001C02F1/048C02F1/12C02F1/16C02F2103/16
Inventor 孙治忠迟建路八智史万敬何春文刘陈彭国华程楚谢成迟栈洋王金峰贺少方周洪涛
Owner JINCHUAN GROUP LIMITED
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