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Hydrochloride waste regenerating process for spray roasting

A technology of spray roasting method and hydrochloric acid waste liquid, applied in the direction of combustion method, combustion type, incinerator, etc., can solve the problems of surrounding workshops and environmental pollution, etc.

Active Publication Date: 2010-05-12
WISDRI ENG & RES INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are such problems in the acid regeneration systems of domestic iron and steel enterprises. The "red smoke" has caused pollution to the surrounding workshops and the environment.

Method used

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  • Hydrochloride waste regenerating process for spray roasting
  • Hydrochloride waste regenerating process for spray roasting
  • Hydrochloride waste regenerating process for spray roasting

Examples

Experimental program
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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] Such as figure 2 Shown, spray roasting method hydrochloric acid waste liquor regeneration process, it comprises the following steps: 1), water operation: roasting furnace heats up, and after roasting furnace ignites and heats up to furnace top 390 ℃, carries out water operation, and rinsing water enters Venturi pre-concentrator , spray into the roaster through the roaster feed pump for water operation, the temperature, pressure, and flow in the roaster reach the set value and run stably for 8-12 hours; 2), 5-10 minutes before the acid operation, Stop supplying rinsing water to the Venturi pre-concentrator, supply hydrochloric acid (new hydrochloric acid or the regenerated acid of the acid regeneration system) in the Venturi pre-concentrator, and the hydrochloric acid addition is to make the weight concentration of hydrochloric acid in the Venturi pre-concentrat...

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Abstract

The invention relates to hydrochloric acid exhausted liquid reclaiming process. It includes the following steps: water operation after 390 centigrade degree; adding 18-20 percent hydrochloric acid before acid operation 5-10 minutes; acid operation; and blowing out. It can reduce brown iron oxide density of discharging gas, and the iron content in reclaimed acid.

Description

technical field [0001] The invention relates to a regeneration process of hydrochloric acid waste liquid by a spray roasting method. Background technique [0002] The hydrochloric acid pickling waste liquid of iron and steel enterprises generally adopts the spray roasting method to regenerate the waste acid. The method for regenerating hydrochloric acid waste liquid by the existing spray roasting method comprises the following steps: 1. Water operation: the roasting furnace heats up, and the rinsing water enters the Venturi pre-concentrator, and is sprayed into the roasting furnace by the roasting furnace feed pump to carry out water purification. Operation, the water operation time is about 12 hours. The function of water operation is to simulate acid operation to stabilize the system working condition, and then switch to acid operation, so that the acid regeneration system can run stably; 2. Acid operation: stop supplying Replenishing rinse water, the hydrochloric acid wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23G7/04
Inventor 赵金标秦健王立群
Owner WISDRI ENG & RES INC LTD
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