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Hot galvanizing deamination tower wastewater recycling plating assisting tank process

A deammonization tower, hot-dip galvanizing technology, applied in hot-dip plating process, metal material coating process, gaseous effluent wastewater treatment, etc., can solve the problems of sludge impurities, difficult treatment, sewage treatment problems, etc., and achieve saving cost, save the amount of chemicals used, and reduce the effect of sewage treatment costs

Inactive Publication Date: 2021-09-07
河北恒创环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the wastewater from the deamination tower is difficult to treat in the wastewater discharged from the hot-dip galvanizing industry. The content of zinc, ammonia nitrogen, and chloride ions in it is very high, and there are some sludge impurities in it, which brings great difficulties to sewage treatment.

Method used

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  • Hot galvanizing deamination tower wastewater recycling plating assisting tank process
  • Hot galvanizing deamination tower wastewater recycling plating assisting tank process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add the control agent to the tank,

[0022] Zinc chloride content 120g / L,

[0023] Ammonium chloride 170g / L,

[0024] After stirring for 45 minutes, pour it into the fluxing tank, and the temperature of the fluxing agent is 55°C.

[0025] Such as figure 1 Shown, a kind of hot-dip galvanizing deammonization tower waste water reusing plating aid tank process comprises the following steps:

[0026] Step 1: Discharge the flue gas produced by the hot-dip galvanized zinc pot into the deamination tower for deamination treatment. After the discharge cleaning time is reached, discharge the waste water treated by the deamination tower into the waste water collection tank through the pump;

[0027] Step 2: Filter the wastewater in the wastewater collection tank through a plate-and-frame filter press, remove the sludge and other granular solid impurities in it, obtain a clear and purified liquid, and discharge it into the chemical addition reaction tank;

[0028] Step 3: Detect...

Embodiment 2

[0034] Present embodiment is all the same as embodiment 1 except that content, temperature are different.

[0035] Add the control agent to the tank,

[0036] Zinc chloride content 130g / L,

[0037] Ammonium chloride 180g / L,

[0038] After stirring for 45 minutes, pour it into the fluxing tank, and the temperature of the fluxing agent is 57°C.

Embodiment 3

[0040] Present embodiment is all the same as embodiment 1 except that content, temperature are different.

[0041] Add the control agent to the tank,

[0042] Zinc chloride content 140g / L,

[0043] Ammonium chloride 190g / L,

[0044] After stirring for 45 minutes, pour it into the fluxing tank, and the temperature of the fluxing agent is 60°C.

[0045] Embodiment 1-3 waste water content situation table among the present invention in table 1

[0046]

[0047] Compared with the traditional deamination tower wastewater directly discharged to the sewage treatment plant, the present invention is to use the zinc chloride and ammonium chloride in the deammonization tower wastewater to remove the sludge inside the deamination tower wastewater and reuse it in the plating flux tank In addition, the amount of zinc chloride and ammonium chloride solid medicine added in the workshop is reduced, and it also saves a lot of water costs in the workshop. At the same time, it prevents the w...

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Abstract

The invention discloses a hot galvanizing deamination tower wastewater recycling plating assisting tank process, which comprises the following steps: step 1, discharging flue gas generated by a hot galvanizing zinc pot into a deamination tower for deamination treatment, and discharging wastewater treated by the deamination tower into a wastewater collecting tank through a pump after reaching discharging and cleaning time; step 2, carrying out filter pressing on the wastewater in the wastewater collecting tank through a plate-and-frame filter press, removing sludge and other granular solid impurities in the wastewater through filter pressing to obtain clear and purified liquid, and discharging the clear and purified liquid into an agent adding reaction tank; step 3, supplementing zinc chloride and ammonium chloride agents according to the content of the zinc chloride and the ammonium chloride, controlling the zinc chloride to be 120-140 g / L, controlling the ammonium chloride to be 170-190 g / L, performing a stirring reaction, and completely dissolving solid agents; and step 4, reserving a certain space in a plating assistant tank of a workshop, and discharging reacted liquid in the agent adding tank into the plating assistant tank. The process has the advantages of low production cost, purification of deamination tower wastewater, environmental protection and no pollution.

Description

technical field [0001] The invention relates to the field of galvanizing technology, in particular to a process for recycling wastewater from a hot-dip galvanizing deammonization tower to help a plating tank. Background technique [0002] Hot-dip galvanizing is to make the molten metal react with the iron substrate to produce an alloy layer, so that the substrate and the coating are combined. Hot-dip galvanizing is degreasing, first remove the oil stain on the surface of the original product, and then go through degreasing and water washing to remove the neutralization effect of the degreasing alkaline solution on the acid, then go through pickling and rust removal, remove the surface scale, and then wash with water. Remove the adverse effects of bringing the acid solution into the flux tank, causing the pH of the flux to drop and the iron content to rise, and finally enter the zinc pot after drying for hot-dip galvanizing. Hot-dip galvanizing has the advantages of uniform ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/58B01D46/02B01D53/78B01D53/96C01G9/03C02F1/00C23C2/02C23C2/06C02F103/18
CPCB01D53/78B01D53/58B01D53/96B01D46/023C02F1/001C23C2/06C23C2/02C01G9/03C02F2103/18Y02A50/20Y02A50/2351
Inventor 樊杰风翟永超徐岩曹浩
Owner 河北恒创环保科技有限公司
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