System for recovering residual heat of ammonia vapor on top of surplus ammonia water ammonia still

An ammonia distillation tower and ammonia steam technology, which is applied in the field of ammonia steam waste heat recovery system at the top of the residual ammonia distillation tower, can solve the problems of reducing energy utilization rate, increasing process water consumption, waste and the like, achieving good economic and social benefits, The effect of promoting a wide range of applications and a small amount of engineering

Inactive Publication Date: 2014-05-21
JIGANG GRP
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AI Technical Summary

Problems solved by technology

The thermal energy of ammonia vapor generated at the top of the ammonia distillation tower has not been effectively recovered and utilized, resulting in waste, reducing energy utilization, and increasing process water consumption

Method used

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  • System for recovering residual heat of ammonia vapor on top of surplus ammonia water ammonia still
  • System for recovering residual heat of ammonia vapor on top of surplus ammonia water ammonia still

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Embodiment Construction

[0018] In order to facilitate the understanding of the technical content of the present invention, the technical solutions thereof will be further described below in conjunction with the accompanying drawings.

[0019] Such as figure 1 with figure 2 As shown, a waste heat recovery system for ammonia vapor at the top of the residual ammonia distillation tower includes an ammonia distillation tower 1, a heat pump unit 2, a circulating hot water pump 3, a reboiler 4, a waste water pump 5 and a gas-liquid separator 6. The heat pump unit 2 is a (type II) absorption heat pump unit, including an evaporator end 21 , an absorber end 22 , a generator end 23 and a condenser end 24 .

[0020] Ammonia distillation tower 1 has an input port for remaining ammonia water and an outlet for ammonia vapor, and a heating unit is provided at the bottom of ammonia distillation tower 1, through which the remaining ammonia water fed into ammonia distillation tower 1 is effectively evaporated to gene...

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Abstract

The invention discloses a system for recovering residual heat of ammonia vapor on the top of a surplus ammonia water ammonia still. The system comprises an ammonia still, a heat pump unit, a circulating hot water pump, a reboiler, a waste water pump and a gas-liquid separator, wherein the heat pump unit is an absorptive heat pump unit which comprises an evaporator end, an absorber end, a generator end and a condenser end. The heat pump unit is placed on the top of the ammonia still and is used for recycling latent heat of ammonia vapor on the top of the still to heat circulating hot water, the heated circulating hot water is used for heating ammonia distilling waste water at the bottom of the still through the reboiler to produce saturated vapor, and the saturated steam returns into the ammonia still to supply distillation energy and realize recycling of energy, so that the consumption of coal gas or vapor is lowered, and the utilization ratio of recovered residual heat is increased. The ammonia vapor is subjected to gas-liquid separation after recovery of the latent heat, and liquid-phase ammonia water returns into the ammonia still for serving as reflux liquid.

Description

technical field [0001] The invention relates to the technical field of coking residual ammonia water treatment, in particular to an ammonia steam waste heat recovery system at the top of a distillation tower for residual ammonia water. Background technique [0002] During the coking process of coal, a certain amount of ammonia nitrogen, cyanide, sulfide, phenol and residual ammonia water with high concentrations of COD are produced. The remaining ammonia water generally needs to go through treatment processes such as oil removal, phenol removal, ammonia distillation, and phenol cyanide sewage. Ammonia distillation is to remove ammonia, cyanide and sulfide in the remaining ammonia water by distillation, improve the water quality of wastewater, meet the requirements of phenol cyanide sewage treatment process, and recover ammonia for desulfurization or production of ammonium sulfate. According to the heating method, the ammonia distillation process of residual ammonia water ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F1/20
Inventor 甄玉科祝仰勇宁述芹张顺贤牛爱宁李瑞萍刘亮范华磊
Owner JIGANG GRP
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