Technology and device for preparing sulfur pulp by performing vacuum evaporation treatment on coked sulfur foams

A technology of vacuum evaporation and coking sulfur, applied in the chemical industry, sustainable manufacturing/processing, inorganic chemistry, etc., can solve the problems of reducing heat exchange efficiency, melting of suspended sulfur, and high operating costs, reducing heat exchange efficiency, saving energy and reducing costs. The effect of good arrangement and low operating cost

Pending Publication Date: 2019-03-29
ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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AI Technical Summary

Problems solved by technology

[0006] The disadvantage of this pretreatment process is that the process flow is long, the investment is large, and the operating cost is high; at the same time, due to the use of steam heating, the wall temperature of the heat exchange tube is close to the steam temperature, and the steam temperature is higher than the melting point of sulfur (melting point temperature 114.5 ° C) , it is easy to cause the residual suspended sulfur in the concentrated circulating fluid to melt and adhere to the tube wall, greatly reducing the heat transfer efficiency

Method used

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  • Technology and device for preparing sulfur pulp by performing vacuum evaporation treatment on coked sulfur foams
  • Technology and device for preparing sulfur pulp by performing vacuum evaporation treatment on coked sulfur foams

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Embodiment 1

[0039] The sulfur foam at the top of the regeneration tower of the desulfurization unit is directly sent to the sulfur slurry circulating liquid pipeline in front of the circulating liquid heater 2 after being pressurized by the foam pump 7, and then sent to the vacuum evaporation tower 1 for evaporation after being heated by circulating ammonia water. Excess water is produced, and a small amount of ammonia is also evaporated at the same time, and the unevaporated component is sulfur slurry. In the circulating fluid heater 2, the temperature of the mixed circulating fluid is heated from 50-55°C to 65°C, and the temperature of the circulating ammonia water is cooled from 75-80°C to 65°C. The vacuum degree of the vacuum evaporation tower 1 is controlled at 85.6KPa, and the corresponding operating temperature is 55°C. In order to prevent the precipitation of suspended sulfur in the vacuum evaporation tower 1 and the precipitation of ammonium salt crystallization due to excessive ...

Embodiment 2

[0044] The sulfur foam at the top of the regeneration tower of the desulfurization unit is directly sent to the sulfur slurry circulating liquid pipeline in front of the circulating liquid heater 2 after being pressurized by the foam pump 7, and then sent to the vacuum evaporation tower 1 for evaporation after being heated by absorbing acid. Excess water is produced, and a small amount of ammonia is also evaporated at the same time, and the unevaporated component is sulfur slurry. In the circulating fluid heater 2, the temperature of the mixed circulating fluid is heated from 55 to 60°C to 75°C, and the temperature of the absorption acid is cooled from 90 to 100°C to 70°C. The vacuum degree of the vacuum evaporation tower 1 is controlled at 81.4KPa, and the corresponding operating temperature is 60°C. In order to prevent the precipitation of suspended sulfur in the vacuum evaporation tower 1 and the precipitation of ammonium salt crystallization due to excessive local concentr...

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Abstract

The invention relates to a technology and a device for preparing sulfur pulp by performing vacuum evaporation treatment on coked sulfur foams. A vacuum evaporation technology and a low-grade heat source for heating treatment are adopted for treating the coked sulfur foams, so as to prepare sulfur pulp. Compared with the prior art, the invention has the beneficial effects: 1) process flow is simple, construction investment is less and operation cost is low; 2) development and utilization of low-grade residual heat source as secondary energy are realized, energy utilization rate is increased, environmental pollution caused by heat discharge is reduced and energy-saving and emission-reducing effects are excellent; 3) temperature of low-grade heat source is lower than a melting point of sulfur, so that suspending sulfur in sulfur foams is prevented from melting and consequently attaching to heat exchange tubes and reducing heat exchange efficiency.

Description

technical field [0001] The invention relates to the technical field of coking low-quality sulfur and desulfurization waste liquid incineration to produce acid, in particular to a process and device for preparing sulfur slurry from coking sulfur foam by vacuum evaporation, which is suitable for treating coke oven gas produced by ammonia wet oxidation desulfurization process Scorched sulfur foam. Background technique [0002] Coking low-quality sulfur and desulfurization waste liquid incineration to produce acid technology is currently the most economical and environmentally friendly process for treating low-quality sulfur and desulfurization secondary salt waste liquid produced by coke oven gas ammonia wet oxidation desulfurization process. The pretreatment process in this process uses sulfur foam as the initial raw material, adopts the methods of centrifugation, concentration and condensation to prepare sulfur slurry, and then sends it to the incinerator for incineration. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/74
CPCC01B17/74Y02P20/129Y02P20/10
Inventor 王嵩林刘元德张素利
Owner ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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