Spraying and washing process of ammonium sulfate crystallizer by non-saturator method

A crystallizer and saturator technology, applied in the field of coking, can solve the problems of increasing raw material consumption, unfavorable energy saving and consumption reduction, increasing energy consumption, etc., and achieves the effects of reducing energy consumption and operating cost, reducing the number of start-up and shutdown, and prolonging the operation period.

Active Publication Date: 2013-09-04
BAOWU CHARCOAL MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, liquid dilution will inevitably increase energy consumption, and neutralization with liquid ammonia will increase raw material consumption and additional cost, which is very unfavorable for energy saving and consumption reduction

Method used

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  • Spraying and washing process of ammonium sulfate crystallizer by non-saturator method
  • Spraying and washing process of ammonium sulfate crystallizer by non-saturator method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0019] Such as figure 2 As shown, ammonium sulfate crystallizer 1 is provided with ammonium sulfate mother liquor inlet 101, ammonium sulfate mother liquor circulation heating system 102, crystallizer pressure control device 103, crystallizer top temperature control device 104, crystallizer bottom temperature control device 105 and slurry extraction Mouth 106. Simultaneously, the ammonium sulfate crystallizer is also provided with a washing pipeline 4.

[0020] There is also a volume of 10m 3 The distilled ammonia concentrated ammonia water storage tank 2 is used to collect the distilled ammonia concentrated ammonia water produced by the distillation of ammonia water, and is connected to the washing pipeline through the delivery pump 3, and the original separated water or condensed water pipe is cut off.

[0021] The concentration of the distilled concentrated ammonia water in the distilled ammonia concentrated ammonia water storage tank 2 is 5wt%, and the temperature is 45...

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PUM

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Abstract

The invention discloses a spraying and washing process of an ammonium sulfate crystallizer by a non-saturator method, comprising the steps of: spraying and washing the ammonium sulfate crystallizer by ammonia still stronger ammonia water obtained by an ammonia distillation process; washing the attachment on the inner surface of the ammonium sulfate crystallizer; and controlling the acidity of the circulating mother liquor in the ammonium sulfate crystallizer. The mass concentration of the ammonia still stronger ammonia water is 3-6% at 40-55 DEG C. The invention has the maximum advantage of combining the ammonium sulfate crystallizer by non-saturator method with technical characteristics of ammonia distillation, washing ammonium sulfate crystal and attachment on the inner surface of the washing crystallizer by temperature of ammonia and stronger ammonia water in ammonia evaporation stronger ammonia water generated by ammonia distillation and neutralizing a part of free acid in the ammonium sulfate liquor in condition that the production flow does not change. The invention is beneficial to optimize and improve the ammonium sulfate crystallization process and comprehensively utilizing ammonia resources as an important means of energy conservation and emission reduction.

Description

technical field [0001] The invention relates to the field of coking, in particular to a spray washing process for a saturator-free ammonium sulfate crystallizer. Background technique [0002] In the coke oven gas purification process, it is necessary to remove water vapor, tar gas, crude benzene, ammonia, hydrogen sulfide, cyanide, light pyridine base and naphthalene, and recycle the above chemical raw materials. [0003] Coke oven gas contains 7~9g / m 3 of ammonia. The coal gas deamination processes currently used in the coking industry mainly include: washing ammonia distillation concentrated ammonia water process, washing ammonia distilling ammonia ammonia decomposition process, anhydrous ammonia process, and ammonium sulfate process. Among them, the ammonium sulfate process is divided into: saturator method and no saturator method. [0004] The coal gas at 38-40°C from the gas desulfurization tower is circulated and washed with 2.0-3.0 wt% sulfuric acid in the ammonia ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01C1/242B01D9/02
Inventor 颜长青任巍
Owner BAOWU CHARCOAL MATERIAL TECH CO LTD
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