Device for automatically and continuously recycling doctor solution and recycling technique thereof

Abstract

An automatic and continuous desulfurization liquid recovery device and recovery process. The device is composed of a desulfurization liquid continuous filtration system, a desulfurization liquid automatic recovery system and a continuous sulfur melting system. The systems are connected by pipelines. The specific process of automatic recovery is as follows: 1) sulfur foam enters the sulfur foam feed tank from the oxidation regeneration tank through the sulfur foam pipe; 2) the sulfur foam in the sulfur foam feed tank enters the vacuum filter, and the filtered sulfur-containing solid enters the sulfur foam for dilution The desulfurization liquid enters the desulfurization liquid tank, and is absorbed back to the oxidation regeneration tank by the oxidation regeneration tank with a negative pressure absorber; 3) The sulfur foam dilution liquid in the sulfur foam dilution tank is sent to the sulfur melting tank; 4) The sulfur melting tank After the sulfur foam dilution liquid in the furnace is heated by saturated steam, the residual liquid enters the sulfur foam dilution tank, the condensed water is discharged from the sulfur melting tank, and the sulfur is recovered. The invention has simple process, reasonable optimization, less equipment, stable and reliable work, no pollution, low maintenance cost, high efficiency, large production capacity, and can realize energy saving and emission reduction.

Description

technical field [0001] The invention belongs to a technical device for automatically and continuously recovering desulfurization liquid Background technique [0002] Domestic nitrogen fertilizer production enterprises use filter devices such as plate and frame filters and vacuum filters to filter out the desulfurization liquid in the sulfur foam, intermittently recycle it into the system, and then manually fill the sulfur-containing filtrate into the sulfur melting kettle for melting Sulfur, resulting in greater labor intensity for workers. In addition, there are also nitrogen fertilizer production enterprises that use continuous sulfur melting instead of intermittent sulfur melting for sulfur foam. Continuous sulfur melting means that the sulfur foam floated from the oxidation regeneration tank is pressurized and sent to the sulfur melting kettle. Heated to about 150°C by the steam from the outer jacket of the sulfur melting kettle, the sulfur paste and desulfurization liq...

AI Technical Summary

Problems solved by technology

However, since the properties of this desulfurized clear liquid change after being heated at a high temperature, returning to the system will have a serious impact on the regeneration of the solution, causing the solution to foam and overflow, and cannot be well regenerated. Low, high suspended sulfur, black color, low regeneration efficiency, which greatly affects the desulfurization efficiency and deteriorates the desulfurization operating conditions

As a result, some synthetic ammonia production enterprises have to discharge this part of liquid as production sewage, resulting in high desulfurization costs and serious environmental pollution

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