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Method for purifying coking concentrated ammonia water

A technology for concentrated ammonia water and ammonia distillation wastewater, which is applied in chemical instruments and methods, ammonia preparation/separation, ammonia compounds, etc., can solve the problems of difficulty in regeneration, large amount of activated carbon, and no disclosure of purification of coking concentrated ammonia water. The effect of saving investment, simple and reliable regeneration operation, and short process

Pending Publication Date: 2020-06-30
山东洲蓝环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent uses activated carbon plus harmful impurity remover to purify ammonia water. The amount of activated carbon used is large and regeneration is difficult.
[0005] In the above-mentioned documents, there is no public report on the purification of coked concentrated ammonia water using molecular sieves.

Method used

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  • Method for purifying coking concentrated ammonia water

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Experimental program
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Effect test

Embodiment 1

[0038] The specific implementation is as figure 1 In the shown device process, the impurity-containing coking concentrated ammonia water from the coking ammonia distillation section has a tar concentration of 181 mg / L and a naphthalene content of 3000 mg / L, and is sent into an adsorption tower filled with adsorbent, wherein the The adsorbent is a molecular sieve adsorbent, and the adsorbent is a hydrophobic ZSM-5 molecular sieve. The tar content in the coking concentrated ammonia water after adsorption is 2.2 mg / L, and the naphthalene content is 150 mg / L, which will be used in the subsequent denitrification section.

Embodiment 2

[0040] The specific implementation is as figure 1 As shown in the device process, the impurity-containing coking concentrated ammonia water from the coking ammonia distillation section contains a tar concentration of 200mg / L and a naphthalene content of 2000 mg / L, and is sent to the pretreatment tower, and the pretreated coking concentrated ammonia water is sent to the filling An adsorption tower with an adsorbent, wherein the adsorbent is a molecular sieve adsorbent, the adsorbent adopts TS-1 type molecular sieve, the tar content in the coking concentrated ammonia water after adsorption is 3 mg / L, and the naphthalene content is 100 mg / L. Subsequent use section.

Embodiment 3

[0042] The specific implementation is as figure 1 As shown in the device process, the impurity-containing coking concentrated ammonia water from the coking ammonia distillation section contains a tar concentration of 220 mg / L and a naphthalene content of 2000 mg / L, and is sent to the pretreatment tower, and the pretreated coking concentrated ammonia water is sent to the filling An adsorption tower with an adsorbent, wherein the adsorbent is a molecular sieve adsorbent, the adsorbent adopts TS-1 type molecular sieve, the tar content in the coking concentrated ammonia water after adsorption is 1 mg / L, and the naphthalene content is 100mg / L, enter Subsequent use section.

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Abstract

The invention relates to a method for purifying coking concentrated ammonia water, and mainly solves the problems that impurities such as tar and naphthalene in the coking concentrated ammonia water are high, the quality of the coking concentrated ammonia water is influenced, and subsequent transportation pipelines are blocked. The method comprises the following steps: feeding impurity-containingcoking concentrated ammonia water from a coking ammonia distillation section into a pretreatment tower; and feeding the pretreated coking concentrated ammonia water into an adsorption tower filled with a microcrystalline adsorbent, enabling the adsorbed coking concentrated ammonia water to enter a subsequent utilization section, and regenerating adsorption saturated microcrystalline adsorbent withnitrogen at 50-400 DEG C for continuous using, so that the above problems are solved. The treatment method can be used for a coking concentrated ammonia water purification treatment production process flow.

Description

technical field [0001] The invention belongs to the field of coking wastewater treatment, in particular to a method for purifying coking concentrated ammonia water. Background technique [0002] Coking wastewater mainly comes from coking, gas purification and refining of chemical products. The wastewater contains high concentrations of ammonia, phenol, cyanide, oil and other substances. The composition is complex, the pollution concentration is high, and the toxicity is high. It is a refractory industrial wastewater. In order to effectively reduce the ammonia concentration of coking wastewater, the remaining ammonia water is usually treated by distilling ammonia in the system, so as to achieve the purpose of decomposing the ammonia in the distilled wastewater, but it is limited by impurities such as tar and naphthalene entrained in the concentrated ammonia water during the ammonia distillation process , The quality of concentrated ammonia water from ammonia distillation is n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/02
CPCC01C1/024
Inventor 马广伟张燎原董群学
Owner 山东洲蓝环保科技有限公司
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